• In Stock
  • Sold by Newegg
  • Make an Offer
  • New
  • Combo Deals Only
Brands
Show More
Price
Show More
CPU Socket Type
North Bridge
Show More
Additional SATA RAID
Number of DDR Slots
DDR Standard
CPU Type
Show More
Number of DDR2 Slots
DDR2 Standard
Sold by
Number of DDR3 Slots
DDR3 Standard
Maximum Memory Supported
ECC Supported
Registered
Number of DDR4 Slots
DDR4 Standard
PCI Express x16
PCI Express x1
PCI Express 3.0 x16
PCI Slots
SATA
SATA RAID
Additional SATA
Onboard Video Chipset
Audio Channels
Max LAN Speed
USB 1.1/2.0
Form Factor
USB 3.0
All Top Brands
Availability
Condition
Useful Links
Customer Ratings
avatar

Any questions? Our AI beta will help you find out quickly.

Sort By:
View:
Supermicro MBD-X13SCH-LN4F-O, Intel  LGA-1700 Single Socket mATX Server Motherboard
Quick View
Supermicro
Supermicro MBD-X13SCH-LN4F-O, Intel LGA-1700 Single Socket mATX Server Motherboard

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1700
  • CPU Type: Intel Xeon 6300-series/ E-2400/Pretium Processor
  • Number of Processor Support: 1
  • Model #: MBD-X13SCH-LN4F-O
Supermicro MBD-X13SCH-F-O, Intel LGA-1700 Single Socket mATX Server Motherboard
Quick View
Supermicro
Supermicro MBD-X13SCH-F-O, Intel LGA-1700 Single Socket mATX Server Motherboard
  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1700
  • CPU Type: Intel Xeon 6300-series/ E-2400/Pretium Processor
  • Number of Processor Support: 1
  • Model #: MBD-X13SCH-F-O
For Mister FPGA IO Analog Board V6.1+USB Hub V2.1 Board+Fan for Terasic DE10-Nano Mister FPGA
Quick View
  •  
  • $171.28 
  • Free Shipping
Supermicro Motherboard MBD-X11SPI-TF-O Xeon Single Socket S3647 C622 Max.1TB PCI Express ATX (MBD-X11SPI-TF-B) - Bulk packaging - - OEM
Quick View
Supermicro
Supermicro Motherboard MBD-X11SPI-TF-O Xeon Single Socket S3647 C622 Max.1TB PCI Express ATX (MBD-X11SPI-TF-B) - Bulk packaging - - OEM

OUT OF STOCK

  • CPU Type: Supports 2nd Gen Intel Xeon Scalable Processors and Intel Xeon Scalable Processors
  • Model #: MBD-X11SPI-TF-B
SUPERMICRO MBD-X12STH-LN4F-O Micro ATX Workstation Motherboard LGA 1200 Intel C256
Quick View
Supermicro
SUPERMICRO MBD-X12STH-LN4F-O Micro ATX Workstation Motherboard LGA 1200 Intel C256

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1200
  • CPU Type: Supports: 10th Gen Intel Pentium Processor Intel Xeon E-2300 Processor
  • Number of Processor Support: 1
  • Model #: MBD-X12STH-LN4F-O
HPE 879097-001 ProLiant XL230k Gen10 System I/O Server Blade System Board
Quick View
  •  
  • $149.95 
  • Free Shipping
ASRock Rack Server Motherboard E3C232D4U - LGA1151 C232 DDR4 mATX, Internatinal Version - R.O.Korea - No Warranty
Quick View
ASRock Rack
Refurbished ASRock Rack Server Motherboard E3C232D4U - LGA1151 C232 DDR4 mATX, Internatinal Version - R.O.Korea - No Warranty
  • Brand: Asrock Rack
  • CPU Socket Type: LGA 1151
  • CPU Type: Intel® Xeon® E3-1200 v5/v6 Series
  • Number of Processor Support: 1
  • Model #: E3C232D4U=
  •  
  • $128.60 
  • $28.50 Shipping
Supermicro H13SAE-MF Motherboard Micro-ATX AMD EPYC™ 4005/4004 series, Ryzen™ 9000 & 8700G* & 7000 Series single socket LGA-1718.
Quick View
Supermicro H13SAE-MF Motherboard Micro-ATX AMD EPYC™ 4005/4004 series, Ryzen™ 9000 & 8700G* & 7000 Series single socket LGA-1718.
  • Brand: SUPERMICRO
  • CPU Socket Type: Single Socket LGA-1718 (Socket AM5) supported
  • CPU Type: AMD Ryzen 7000 Series
  • Number of Processor Support: 1
  • Model #: MBD-H13SAE-MF-O
Supermicro X13SEM-F Server Motherboard, 5th/4th Gen Intel® Xeon® Scalable processors, Single Socket LGA-4677 (Socket E) supported, CPU TDP supports Up to 350W TDP.
Quick View
Supermicro
Supermicro X13SEM-F Server Motherboard, 5th/4th Gen Intel® Xeon® Scalable processors, Single Socket LGA-4677 (Socket E) supported, CPU TDP supports Up to 350W TDP.
  • Brand: SUPERMICRO
  • Part Number: MBD-X13SEM-F-O
  • CPU Socket Type: LGA 4677
  • CPU Type: Intel Xeon
  • Model #: MBD-X13SEM-F-O
Supermicro X13SEI-TF Server Motherboard, 4th Gen Intel® Xeon® Scalable processors, Single Socket LGA-4677 (Socket E), CPU TDP supports up to 350W TDP
Quick View
Supermicro X13SEI-TF Server Motherboard, 4th Gen Intel® Xeon® Scalable processors, Single Socket LGA-4677 (Socket E), CPU TDP supports up to 350W TDP
  • Brand: SUPERMICRO
  • Part Number: MBD-X13SEI-TF-O
  • CPU Socket Type: LGA 4677
  • CPU Type: Intel Xeon
  • Model #: MBD-X13SEI-TF-O
SUPERMICRO MBD-X12DPI-N6-O Extended ATX Server Motherboard LGA 4189 Intel C621A
Quick View
Supermicro
SUPERMICRO MBD-X12DPI-N6-O Extended ATX Server Motherboard LGA 4189 Intel C621A

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 4189
  • CPU Type: Supports 3rd Gen Intel Xeon Scalable processors
  • North Bridge: Intel C621A
  • Model #: MBD-X12DPI-N6-O
SUPERMICRO MBD-X12SAE-5-O ATX Server Motherboard LGA 1200 Intel W580
Quick View
Supermicro
SUPERMICRO MBD-X12SAE-5-O ATX Server Motherboard LGA 1200 Intel W580
  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1200
  • CPU Type: Supports 11th Generation Intel Core i5/i7/i9 Processors, Intel Xeon W-1300 Processors
  • North Bridge: Intel W580
  • Model #: MBD-X12SAE-5-O
SUPERMICRO MBD-X13SAZ-Q-O Micro ATX Server Motherboard LGA 1700 Intel Q670E
Quick View
Supermicro
SUPERMICRO MBD-X13SAZ-Q-O Micro ATX Server Motherboard LGA 1700 Intel Q670E
  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1700
  • CPU Type: Supports 12th Generation Intel Core i9 / Core i7 / Core i5 / Core i3 / Pentium / Celeron Processor
  • Number of Processor Support: 1
  • Model #: MBD-X13SAZ-Q-O
Supermicro MBD-X13SCL-F-O, Intel LGA 1700 Single Socket mATX Server Motherboard
Quick View
Supermicro
Supermicro MBD-X13SCL-F-O, Intel LGA 1700 Single Socket mATX Server Motherboard

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1700
  • CPU Type: Intel Xeon 6300-series/ E-2400/Pretium Processor
  • Number of Processor Support: 1
  • Model #: MBD-X13SCL-F-O
SUPERMICRO MBD-X13SAE-O ATX Server Motherboard LGA 1700 Intel W680
Quick View
SUPERMICRO MBD-X13SAE-O ATX Server Motherboard LGA 1700 Intel W680

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1700
  • CPU Type: Supports 12th Generation Intel Core i9 / Core i7 / Core i5 / Core i3 Processor
  • Number of Processor Support: 1
  • Model #: MBD-X13SAE-O
Intel® Xeon® E-2300 LGA 1200 Rack Optimized Mini ITX compact form factor increases density , plus dual 1G LAN, M.2 unleash independent I/O for OS drive, six SATA, one PCIe 4.0 slots, four USB 3.2 Gen
Quick View
ASUS
Intel® Xeon® E-2300 LGA 1200 Rack Optimized Mini ITX compact form factor increases density , plus dual 1G LAN, M.2 unleash independent I/O for OS drive, six SATA, one PCIe 4.0 slots, four USB 3.2 Gen
  • Brand: ASUS
  • CPU Socket Type: LGA 1200
  • CPU Type: Intel® Xeon® Scalable Processors (up to 3rd Gen)
  • Supported CPU Technologies: Supports Intel® Xeon® Scalable Processors (up to 3rd Gen)
  • Model #: P12R-I
SUPERMICRO MBD-X12SPA-TF-O Extended ATX Server Motherboard LGA 4189 Intel C621A
Quick View
SUPERMICRO MBD-X12SPA-TF-O Extended ATX Server Motherboard LGA 4189 Intel C621A

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 4189
  • CPU Type: Supports 3rd Gen Intel Xeon Scalable processors, Intel Xeon W-3300 Processor
  • North Bridge: Intel C621A
  • Model #: MBD-X12SPA-TF-O
Supermicro H13SRA-F motherboard. AMD Ryzen™ Threadripper™ PRO 7000 WX-Series and Ryzen™ Threadripper™ 7000 Series Processors, Single socket sTR5, LGA-4844, Up to 350W TDP, Overclocking supported
Quick View
Supermicro
Supermicro H13SRA-F motherboard. AMD Ryzen™ Threadripper™ PRO 7000 WX-Series and Ryzen™ Threadripper™ 7000 Series Processors, Single socket sTR5, LGA-4844, Up to 350W TDP, Overclocking supported

OUT OF STOCK

  • Part Number: MBD-H13SRA-F-O
  • CPU Type: AMD Ryzen Threadripper PRO 7000 Series
  • Number of Processor Support: 1
  • Memory Standard: DDR5 4800
  • Model #: MBD-H13SRA-F-O
SUPERMICRO MBD-X12SPI-TF-O ATX Server Motherboard LGA 4189 Intel C621A
Quick View
SUPERMICRO MBD-X12SPI-TF-O ATX Server Motherboard LGA 4189 Intel C621A

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 4189
  • CPU Type: Supports 3rd Gen Intel Xeon Scalable processors
  • North Bridge: Intel C621A
  • Model #: MBD-X12SPI-TF-O
Supermicro Server Motherboard MBD-H13SSL-NT, Socket SP5 AMD 4th Gen  EPYC™ 9004/9005, Up to 3TB 3DS ECC RDIMM DDR5, ATX. Support of "EPYC 5th Gen 9005 Series"
Quick View
Supermicro Server Motherboard MBD-H13SSL-NT, Socket SP5 AMD 4th Gen EPYC™ 9004/9005, Up to 3TB 3DS ECC RDIMM DDR5, ATX. Support of "EPYC 5th Gen 9005 Series"

OUT OF STOCK

  • Part Number: MBD-H13SSL-NT-O
  • CPU Type: AMD EPYC™ 9004 series Processors
  • Number of Processor Support: 1
  • Memory Slots: 12 DIMM slots Up to 3TB 3DS ECC Registered RDIMM, DDR5-4800MHz
  • Model #: MBD-H13SSL-NT-O
Supermicro X14SBM-TF Server Motherboard, Intel® Xeon® 6700E-series processors, Single Socket LGA-4710 (Socket E2) supported, CPU TDP supports Up to 350W TDP
Quick View
Supermicro X14SBM-TF Server Motherboard, Intel® Xeon® 6700E-series processors, Single Socket LGA-4710 (Socket E2) supported, CPU TDP supports Up to 350W TDP

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 4710
  • CPU Type: Intel Xeon
  • Number of Processor Support: 1
  • Model #: MBD-X14SBM-TF-O
Supermicro X14SBI-F Server Motherboard, Intel® Xeon® 6700-series processors with E-cores, Single Socket LGA-4710 (Socket E2) supported, CPU TDP supports Up to 350W TDP
Quick View
Supermicro
Supermicro X14SBI-F Server Motherboard, Intel® Xeon® 6700-series processors with E-cores, Single Socket LGA-4710 (Socket E2) supported, CPU TDP supports Up to 350W TDP

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 4710
  • CPU Type: Intel Xeon
  • Number of Processor Support: 1
  • Model #: MBD-X14SBI-F-O
SUPERMICRO MBD-X13SAZ-F-O Micro ATX Server Motherboard LGA 1700 Intel R680E
Quick View
SUPERMICRO MBD-X13SAZ-F-O Micro ATX Server Motherboard LGA 1700 Intel R680E
  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1700
  • CPU Type: Supports 12th Generation Intel Core i9/Core i7/Core i5/Core i3/Pentium/Celeron Processor
  • North Bridge: Intel R680E
  • Model #: MBD-X13SAZ-F-O
  • $541.67 - $555.18
Supermicro X14SBI-TF Server Motherboard, Intel® Xeon® 6700-series processors with E-cores, Single Socket LGA-4710 (Socket E2) supported, CPU TDP supports Up to 350W TDP
Quick View
Supermicro
Supermicro X14SBI-TF Server Motherboard, Intel® Xeon® 6700-series processors with E-cores, Single Socket LGA-4710 (Socket E2) supported, CPU TDP supports Up to 350W TDP

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 4710
  • CPU Type: Intel Xeon
  • Number of Processor Support: 1
  • Model #: MBD-X14SBI-TF-O
SUPERMICRO MBD-X13SAE-F-O ATX Server Motherboard LGA 1700 Intel W680
Quick View
SUPERMICRO MBD-X13SAE-F-O ATX Server Motherboard LGA 1700 Intel W680

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1700
  • CPU Type: Supports 12th Generation Intel Core i3/i5/i7/i9 Processors
  • North Bridge: Intel W680
  • Model #: MBD-X13SAE-F-O
Supermicro MBD-H13SRA-TF-O  Threadripper PRO motherboard, Single socket sTR5, LGA-4844.
Quick View
Supermicro MBD-H13SRA-TF-O Threadripper PRO motherboard, Single socket sTR5, LGA-4844.

OUT OF STOCK

  • Part Number: MBD-H13SRA-TF-O
  • CPU Type: AMD Ryzen Threadripper PRO 7000 Series
  • Number of Processor Support: 1
  • Memory Standard: DDR5 4800
  • Model #: MBD-H13SRA-TF-O
Supermicro MB MBDH12SSLCTO Socket SP3 AMD EPYC 7003 Milan/EPYC 7002 Rome Max2TB DDR4 PCIE ATX
Quick View
Supermicro
Supermicro MB MBDH12SSLCTO Socket SP3 AMD EPYC 7003 Milan/EPYC 7002 Rome Max2TB DDR4 PCIE ATX

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: Socket SP3
  • CPU Type: Supports AMD EPYC 7003/7002 Series Processor (The latest AMD EPYC 7003 Series Processor with AMD 3D V-Cache Technology requires BIOS version 2.3 or newer)
  • Number of DDR4 Slots: 8 x 288-pin
  • Model #: MBD-H12SSL-CT-O
SUPERMICRO MBD-X11SSM-F-O Micro ATX Server Motherboard LGA 1151 Intel C236
Quick View
SUPERMICRO MBD-X11SSM-F-O Micro ATX Server Motherboard LGA 1151 Intel C236

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1151
  • CPU Type: Supports: Intel 7th/6th Generation Core i3 series Intel Xeon processor E3-1200 v6/v5 Intel Celeron Intel Pentium
  • North Bridge: Intel C236
  • Model #: MBD-X11SSM-F-O
SUPERMICRO MBD-X12STL-IF-O Mini ITX Server Motherboard LGA 1200 Intel C252
Quick View
SUPERMICRO MBD-X12STL-IF-O Mini ITX Server Motherboard LGA 1200 Intel C252

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1200
  • CPU Type: Supports 10th Generation Intel Pentium Processor Intel Xeon E-2300 Processor
  • Number of Processor Support: 1
  • Model #: MBD-X12STL-IF-O
SUPERMICRO MBD-X11SCL-IF-O Mini ITX Server Motherboard LGA 1151 Intel C242
Quick View
SUPERMICRO MBD-X11SCL-IF-O Mini ITX Server Motherboard LGA 1151 Intel C242

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1151
  • CPU Type: Supports: Intel Xeon E-2100 Processor Intel Xeon E-2200 Processor 8th/9th Generation Intel Core i3 / Pentium / Celeron Processor
  • North Bridge: Intel C242
  • Model #: MBD-X11SCL-IF-O
SUPERMICRO MBD-X11SSH-F-O Micro ATX Server Motherboard LGA 1151 Intel C236
Quick View
SUPERMICRO MBD-X11SSH-F-O Micro ATX Server Motherboard LGA 1151 Intel C236

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1151
  • CPU Type: Intel 7th / 6th Generation Core i3 series, Intel Celeron, Intel Pentium, Intel Xeon processor E3-1200 v6 / v5 Socket H4 (LGA 1151) supported, CPU TDP support 80W
  • North Bridge: Intel C236
  • Model #: MBD-X11SSH-F-O
Supermicro X11SPH-NCTF Server Motherboard - Intel Chipset - Socket P LGA-3647 - 1 x Retail Pack
Quick View
Supermicro X11SPH-NCTF Server Motherboard - Intel Chipset - Socket P LGA-3647 - 1 x Retail Pack

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 3647
  • CPU Type: Intel Xeon Scalable Processors Single Socket P (LGA 3647) supported, CPU TDP support 205W
  • North Bridge: Intel C622
  • Model #: MBD-X11SPH-NCTF-O
Supermicro MBD-M12SWA-TF-O AMD Ryzen Threadripper PRO Workstation 5000WX/3000WX Series EATX Motherboard, Up To 64-Core, Socket sWRX8/SP3, WRX80 Chipset, with 8 DDR4 DIMM Slots
Quick View
Supermicro MBD-M12SWA-TF-O AMD Ryzen Threadripper PRO Workstation 5000WX/3000WX Series EATX Motherboard, Up To 64-Core, Socket sWRX8/SP3, WRX80 Chipset, with 8 DDR4 DIMM Slots

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: Socket sWRX8
  • CPU Type: Supports AMD Ryzen Threadripper PRO 5000WX/3000WX Series Processor
  • North Bridge: AMD WRX80
  • Model #: MBD-M12SWA-TF-O
SUPERMICRO MBD-M11SDV-8CT-LN4F-O Mini ITX Server Motherboard
Quick View
SUPERMICRO MBD-M11SDV-8CT-LN4F-O Mini ITX Server Motherboard

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Type: Supports AMD EPYC 3201 SoC Processor
  • Supported CPU Technologies: 8 Core / 8 Thread
  • Number of DDR4 Slots: 4 x 288-pin
  • Model #: MBD-M11SDV-8CT-LN4FO
  •  
  • $619.00 
  • $6.81 Shipping
SUPERMICRO MBD-X12SPM-LN4F-O Micro ATX Server Motherboard Socket P+ Intel C621A
Quick View
SUPERMICRO MBD-X12SPM-LN4F-O Micro ATX Server Motherboard Socket P+ Intel C621A

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: Socket P+
  • CPU Type: Supports 3rd Gen Intel Xeon Scalable processors
  • North Bridge: Intel C621A
  • Model #: MBD-X12SPM-LN4F-O
SUPERMICRO MBD-X11SSH-LN4F-O Micro ATX Server Motherboard LGA 1151 Intel C236
Quick View
SUPERMICRO MBD-X11SSH-LN4F-O Micro ATX Server Motherboard LGA 1151 Intel C236

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1151
  • CPU Type: Supports: Intel 7th / 6th Generation Core i3 series Intel Xeon processor E3-1200 v6/v5 Intel Celeron Intel Pentium
  • North Bridge: Intel C236
  • Model #: MBD-X11SSH-LN4F-O
SUPERMICRO MBD-X11SAE-F-O ATX Server Motherboard LGA 1151 Intel C236
Quick View
SUPERMICRO MBD-X11SAE-F-O ATX Server Motherboard LGA 1151 Intel C236

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1151
  • CPU Type: Supports: Intel 6th/7th Generation Core i3 / i5 / i7 Intel Xeon processor E3-1200 v6/v5
  • North Bridge: Intel C236
  • Model #: MBD-X11SAE-F-O
Supermicro MBD-X13SCL-IF-O Intel LGA-1700 Single Socket Mini-ITX Server Motherboard
Quick View
Supermicro MBD-X13SCL-IF-O Intel LGA-1700 Single Socket Mini-ITX Server Motherboard

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1700
  • CPU Type: Intel Xeon 6300-series/ E-2400/Pretium Processor
  • Number of Processor Support: 1
  • Model #: MBD-X13SCL-IF-O
SUPERMICRO MBD-X11SAE-M-O Micro ATX Server Motherboard LGA 1151 Intel C236
Quick View
SUPERMICRO MBD-X11SAE-M-O Micro ATX Server Motherboard LGA 1151 Intel C236

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1151
  • CPU Type: Intel Xeon processor E3-1200 v6 / v5 Intel 6th / 7th Generation Core i3 / i5 / i7 series
  • North Bridge: Intel C236
  • Model #: MBD-X11SAE-M-O
Supermicro MotherBoard MBD-X11DPI-NT-O Xeon Dual Socket LGA3647 C622 Max.2T PCI Express E-ATX (MBD-X11DPI-NT-O)
Quick View
Supermicro MotherBoard MBD-X11DPI-NT-O Xeon Dual Socket LGA3647 C622 Max.2T PCI Express E-ATX (MBD-X11DPI-NT-O)

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: Dual LGA 3647
  • CPU Type: Supports 2nd Gen Intel Xeon Scalable Processors and Intel Xeon Scalable Processors
  • North Bridge: Intel C622
  • Model #: MBD-X11DPI-NT-O
SUPERMICRO MBD-X12SAE ATX Server Motherboard LGA 1200 Intel W480
Quick View
SUPERMICRO MBD-X12SAE ATX Server Motherboard LGA 1200 Intel W480

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1200
  • CPU Type: 10th Generation Intel Core i9/Core i7/Core i5/Core i3/Pentium/Celeron Processor, Intel Xeon W-1200 Processors
  • North Bridge: Intel W480
  • Model #: MBD-X12SAE-O
SUPERMICRO MBD-X12SPM-TF-O Micro ATX Server Motherboard LGA 4189 Intel C621A
Quick View
Supermicro
SUPERMICRO MBD-X12SPM-TF-O Micro ATX Server Motherboard LGA 4189 Intel C621A

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 4189
  • CPU Type: Supports 3rd Gen Intel Xeon Scalable processors
  • North Bridge: Intel C621A
  • Model #: MBD-X12SPM-TF-O
  •  
  • $699.00 
  • Free Shipping
Supermicro MBD-X12SCZ-F-O Single Socket LGA 1200/ Intel W480/ DDR4/ SATA3&USB3.2/ M.2 microATX Server Motherboard,
Quick View
  •  
  • $420.99 
  • Free Shipping
SUPERMICRO MBD-X12SPM-LN6TF Micro ATX Server Motherboard Socket P+ Intel C621A
Quick View
Supermicro
SUPERMICRO MBD-X12SPM-LN6TF Micro ATX Server Motherboard Socket P+ Intel C621A
  • Brand: SUPERMICRO
  • CPU Socket Type: Socket P+
  • CPU Type: Supports 3rd Gen Intel Xeon Scalable processors
  • North Bridge: Intel C621A
  • Model #: MBD-X12SPM-LN6TF-O
SUPERMICRO MBD-X12SCZ-F ATX Server Motherboard 10th Generation Intel Core i9/Core i7/Core i5/Core i3 Processor, Intel Xeon W-1200 Processors
Quick View
Supermicro
SUPERMICRO MBD-X12SCZ-F ATX Server Motherboard 10th Generation Intel Core i9/Core i7/Core i5/Core i3 Processor, Intel Xeon W-1200 Processors

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1200
  • CPU Type: Supports 10th Generation Intel Core i9/Core i7/Corei5/Corei3/Pentium/Celeron Processor, Intel Xeon W-1200 Processors
  • North Bridge: Intel W480
  • Model #: MBD-X12SCZ-F--O
SUPERMICRO MBD-X12SCZ-QF-O Micro ATX Server Motherboard LGA 1200 Intel Q470
Quick View
Supermicro
SUPERMICRO MBD-X12SCZ-QF-O Micro ATX Server Motherboard LGA 1200 Intel Q470

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1200
  • CPU Type: Supports 10th Generation Intel Core i9/Core i7/Corei5/Corei3/Pentium/Celeron Processor
  • North Bridge: Intel Q470
  • Model #: MBD-X12SCZ-QF-O
  • $439.00
  •  
  • $329.25 
  • Save: $109.75 (25%)
  • Free Shipping
Supermicro X11SCM-LN8F Server Motherboard - Intel Chipset - Socket H4 LGA-1151
Quick View
Supermicro
Supermicro X11SCM-LN8F Server Motherboard - Intel Chipset - Socket H4 LGA-1151
  • CPU Type: Celeron Pentium Xeon Core i3
  • System Bus: 2.67 GHz 2.40 GHz 2.13 GHz
  • Maximum Memory Supported: 128GB
  • SCSI: Serial ATA/600
  • Model #: MBD-X11SCM-LN8F-O
SUPERMICRO MBD-X12SCZ-TLN4F-O Micro ATX Server Motherboard LGA 1200 Intel W480E
Quick View
Supermicro
SUPERMICRO MBD-X12SCZ-TLN4F-O Micro ATX Server Motherboard LGA 1200 Intel W480E

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1200
  • CPU Type: Supports 10th Generation Intel Core i9/Core i7/Core i5/Core i3 Processor, Intel Xeon W-1200 Processors
  • North Bridge: Intel W480E
  • Model #: MBD-X12SCZ-TLN4F-O
SUPERMICRO MBD-X12SCQ-O Micro ATX Server Motherboard LGA 1200 Intel Q470E
Quick View
Supermicro
SUPERMICRO MBD-X12SCQ-O Micro ATX Server Motherboard LGA 1200 Intel Q470E

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1200
  • CPU Type: Supports 10th Generation Intel Core i9 / Core i7 / Core i5 / Core i3 / Pentium / Celeron Processor
  • North Bridge: Intel Q470E
  • Model #: MBD-X12SCQ-O
Supermicro MBD-X13DEI-T-O, Intel LGA-4677 Dual Socket EATX Server Motherboard
Quick View
Supermicro
Supermicro MBD-X13DEI-T-O, Intel LGA-4677 Dual Socket EATX Server Motherboard

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 4677
  • CPU Type: 4th Gen Intel Xeon Scalable / 5th Gen Intel Xeon Scalable
  • Number of Processor Support: 2
  • Model #: MBD-X13DEI-T-O
SUPERMICRO MBD-X11SRL-F-O Server Motherboard LGA 2066 Intel C422
Quick View
Supermicro
SUPERMICRO MBD-X11SRL-F-O Server Motherboard LGA 2066 Intel C422

OUT OF STOCK

  • CPU Type: Supports Intel Xeon W-2100 / W-2200 Processors
  • Supported CPU Technologies: Single Socket R4 (LGA 2066) supported, CPU TDP support Up to 140W TDP
  • DDR4 Standard: DDR4 2666
  • Maximum Memory Supported: 256GB
  • Model #: MBD-X11SRL-F-O
SUPERMICRO MBD-X12DPI-NT6-O Extended ATX Server Motherboard LGA 4189 Intel C621A
Quick View
Supermicro
SUPERMICRO MBD-X12DPI-NT6-O Extended ATX Server Motherboard LGA 4189 Intel C621A

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 4189
  • CPU Type: Supports Dual 3rd Gen Intel Xeon Scalable processors
  • North Bridge: Intel C621A
  • Model #: MBD-X12DPI-NT6-O
ASRock Rack E3C246D4U Motherboard + IO Plate | LGA 1151 | Up to 128GB DDR4 ECC
Quick View
ASRock Rack
Refurbished ASRock Rack E3C246D4U Motherboard + IO Plate | LGA 1151 | Up to 128GB DDR4 ECC
  • CPU Type: Intel Core 2 Quad / Core 2 Duo / Pentium Dual-Core
  • Model #: BEE3C246D4U
  •  
  • $379.99 
  • Free Shipping
Supermicro X11SSH-GF-1585 Server Motherboard - Intel Chipset - Socket BGA-1440 - Intel Xeon E3-1585 v5 Quad-core (4 Core) - 1 x Retail Pack
Quick View
Supermicro
Open Box Supermicro X11SSH-GF-1585 Server Motherboard - Intel Chipset - Socket BGA-1440 - Intel Xeon E3-1585 v5 Quad-core (4 Core) - 1 x Retail Pack
  • Brand: SUPERMICRO
  • CPU Socket Type: FCBGA1440
  • CPU Type: Supports Intel Xeon processor E3-1585 v5 Socket FCBGA1440 supported, CPU TDP support 65W
  • North Bridge: Intel C236
  • Model #: MBD-X11SSH-GF-1585-O
  •  
  • $701.99 
  • Free Shipping
Supermicro Server Board X9DAI LGA2011 C602 DDR Dual LAN EATX. International Version - R.O.Korea - NO Mfgr. Warranty
Quick View
Supermicro
Refurbished Supermicro Server Board X9DAI LGA2011 C602 DDR Dual LAN EATX. International Version - R.O.Korea - NO Mfgr. Warranty
  • Brand: SUPERMICRO
  • CPU Socket Type: Dual LGA 2011
  • CPU Type: 2 x Intel Xeon E5-2600 Series (up to 150W TDP)
  • QPI: Up to 8 GT/s
  • Model #: MBD-X9DAi-O
  •  
  • $104.00 
  • $42.00 Shipping
Supermicro Serverboard X10DAI LGA2011 C612 DDR4 Motherboard Only International Version - R.O.Korea - No Warranty
Quick View
Supermicro
Refurbished Supermicro Serverboard X10DAI LGA2011 C612 DDR4 Motherboard Only International Version - R.O.Korea - No Warranty
  • Part Number: MD-X10DAI-B
  • CPU Type: Intel® Xeon® processor E5-2600 v4/v3 family
  • Number of Processor Support: 2
  • Supported CPU Technologies: Hyper-Threading Technology
  • Model #: MBD-X10DAI-O
  •  
  • $288.60 
  • $37.50 Shipping
ASUS Q670EM-IM-A IoT motherboard, Supports up to 125-watt Intel® 13th/12th Gen processors, LGA1700
Quick View
  • $281.26 - $288.07
TYAN S5160G2NR-RS ATX Server Motherboard LGA 775 Intel E7230 DDR2 667
Quick View
TYAN S5160G2NR-RS ATX Server Motherboard LGA 775 Intel E7230 DDR2 667
  • CPU Type: Intel Pentium 4 (Prescott Ready)
  • System Bus: 1066/800/533 MHz
  • Supported CPU Technologies: Hyper-Threading Technology
  • South Bridge: Intel ICH7R
  • Model #: S5160G2NR-RS
  •  
  • $179.00 
  • $15.00 Shipping
TYAN S5353G3NR SSI CEB Server Motherboard Dual mPGA604 Intel E7320 DDR2 400
Quick View
TYAN S5353G3NR SSI CEB Server Motherboard Dual mPGA604 Intel E7320 DDR2 400
  • CPU Type: Dual Intel Xeon
  • System Bus: 800 MHz
  • South Bridge: Intel 6300ESB
  • Other Chipset: SMSC DME1737 LPC super I/O chip
  • Model #: S5353G3NR
  •  
  • $179.00 
  • $15.00 Shipping
TYAN S5372G2NR-LH Tempest i5000VS Dual LGA 771 Intel 5000V SSI CEB Dual Intel Xeon Server Motherboard
Quick View
TYAN S5372G2NR-LH Tempest i5000VS Dual LGA 771 Intel 5000V SSI CEB Dual Intel Xeon Server Motherboard
  • Brand: TYAN
  • CPU Socket Type: Dual LGA 771
  • CPU Type: Dual Intel Xeon
  • North Bridge: Intel 5000V
  • Model #: S5372G2NR-LH
  •  
  • $209.00 
  • $15.00 Shipping
TYAN S2735G3NR-8M ATX footprint Server Motherboard Dual mPGA604 Intel E7501
Quick View
TYAN S2735G3NR-8M ATX footprint Server Motherboard Dual mPGA604 Intel E7501
  • CPU Type: Dual Intel Xeon
  • System Bus: 533/400 MHz
  • South Bridge: Intel ICH5R
  • Other Chipset: Winbond W83627HF Super I/O chip Winbond W83782D hardware monitoring chip
  • Model #: S2735G3NR-8M
  •  
  • $259.00 
  • $38.99 Shipping
Tyan S2875ANRF Tiger K8W AMD-8151 Socket 940 Serial ATA-150 ATX Motherboard
Quick View
Refurbished Tyan S2875ANRF Tiger K8W AMD-8151 Socket 940 Serial ATA-150 ATX Motherboard
  • CPU Type: Dual AMD Opteron
  • South Bridge: AMD 8111
  • Other Chipset: Winbond W83627HF Super I/O ASIC
  • Number of DDR Slots: 4 x 184Pin
  • Model #: S2875ANRF
  •  
  • $359.00 
  • $15.00 Shipping
SUPERMICRO MBD-X12STH-F-O Micro ATX Workstation Motherboard LGA 1200 Intel C256
Quick View
Supermicro
SUPERMICRO MBD-X12STH-F-O Micro ATX Workstation Motherboard LGA 1200 Intel C256

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1200
  • CPU Type: Supports: 10th Gen Intel Pentium Processor Intel Xeon E-2300 Processor
  • Number of Processor Support: 1
  • Model #: MBD-X12STH-F-O
Supermicro X11SAT-F Workstation Motherboard - Intel C236 Chipset - Socket H4 LGA-1151 - Retail Pack
Quick View
Supermicro X11SAT-F Workstation Motherboard - Intel C236 Chipset - Socket H4 LGA-1151 - Retail Pack

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: Single Socket H4 (LGA 1151)
  • CPU Type: Supports: Intel 6th/7th Generation Core i3 / i5 / i7 Intel Xeon processor E3-1200 v6/v5
  • North Bridge: Intel C236 chipset
  • Model #: MBD-X11SAT-F-O
SUPERMICRO MBD-X11SCH-LN4F-O Micro ATX Server Motherboard LGA 1151 Intel C246
Quick View
SUPERMICRO MBD-X11SCH-LN4F-O Micro ATX Server Motherboard LGA 1151 Intel C246

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1151
  • CPU Type: 8th Generation Intel Core i3 / Pentium / Celeron Processor, Intel Xeon Processor E-2100 series. Socket LGA 1151 supported, CPU TDP support Up to 95W TDP
  • North Bridge: Intel C246
  • Model #: MBD-X11SCH-LN4F-O
Supermicro Motherboard MBDH12SSLNTO Socket SP3 AMD EPYC 7003 Milan/7002 Roma Max 2TB DDR4 PCIE ATX
Quick View
Supermicro Motherboard MBDH12SSLNTO Socket SP3 AMD EPYC 7003 Milan/7002 Roma Max 2TB DDR4 PCIE ATX

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: Socket SP3
  • CPU Type: Supports AMD EPYC 7003/7002 Series Processor (7003 Series Processor drop-in support requires BIOS version 2.0 or newer)
  • Number of Processor Support: 1
  • Model #: MBD-H12SSL-NT-O
SUPERMICRO MBD-X10SDV-TLN4F-O Mini ITX Server Motherboard Xeon Processor D-1541 FCBGA 1667
Quick View
SUPERMICRO MBD-X10SDV-TLN4F-O Mini ITX Server Motherboard Xeon Processor D-1541 FCBGA 1667

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: FCBGA1667
  • CPU Type: Intel Xeon processor D-1541
  • DDR4 Standard: DDR4 2133 / 1866 / 1600 MHz ECC RDIMM and ECC / Non-ECC UDIMM
  • Model #: MBD-X10SDV-TLN4F-O
  •  
  • $1,045.00 
  • Free Shipping
Supermicro MB MBDH12SSLiO Support AMD EPYC 7003 Milan/7002 Rome
Quick View
Supermicro MB MBDH12SSLiO Support AMD EPYC 7003 Milan/7002 Rome

OUT OF STOCK

  • CPU Type: Supports AMD EPYC 7003/7002 Series Processor (The latest AMD EPYC 7003 Series Processor with AMD 3D V-Cache Technology requires BIOS version 2.3 or newer)
  • Model #: MBD-H12SSL-I-O
SUPERMICRO MBD-X12SPL-F-O ATX Server Motherboard, Socket LGA-4189, support 3rd Gen Intel Xeon Scalable processors.
Quick View
SUPERMICRO MBD-X12SPL-F-O ATX Server Motherboard, Socket LGA-4189, support 3rd Gen Intel Xeon Scalable processors.

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 4189
  • CPU Type: Supports 3rd Gen Intel Xeon Scalable processors
  • North Bridge: Intel C621A
  • Model #: MBD-X12SPL-F-O
SUPERMICRO MBD-X11SAE-O ATX Server Motherboard LGA 1151 Intel C236
Quick View
SUPERMICRO MBD-X11SAE-O ATX Server Motherboard LGA 1151 Intel C236

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1151
  • CPU Type: Intel Xeon processor E3-1200 v5, Intel 6th Gen Core i7 / i5 / i3 series processors CPU TDP up to 95W
  • North Bridge: Intel C236
  • Model #: MBD-X11SAE-O
X11SPI-TF XEON MAX-1TB DDR4 ATX
Quick View
X11SPI-TF XEON MAX-1TB DDR4 ATX

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 3647
  • CPU Type: Supports 2nd Gen Intel Xeon Scalable Processors and Intel Xeon Scalable Processors
  • North Bridge: Intel C622
  • Model #: MBD-X11SPI-TF-O
SUPERMICRO MBD-H12DSi-N6-O Extended ATX Server Motherboard Socket SP3
Quick View
SUPERMICRO MBD-H12DSi-N6-O Extended ATX Server Motherboard Socket SP3

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: Socket SP3
  • CPU Type: Supports AMD EPYC 7003/7002 Series Processors (The latest AMD EPYC 7003 Series Processor with AMD 3D V-Cache Technology requires BIOS version 2.3 or newer)
  • Number of Processor Support: 2
  • Model #: MBD-H12DSi-N6-O
SUPERMICRO MBD-X11SCA-F-O LGA 1151 Intel C246 DDR4 U.2 M.2 DP HDMI DVI VGA IPMI ATX Workstation Motherboard
Quick View
SUPERMICRO MBD-X11SCA-F-O LGA 1151 Intel C246 DDR4 U.2 M.2 DP HDMI DVI VGA IPMI ATX Workstation Motherboard

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1151
  • CPU Type: Supports: Intel Xeon E-2100 Processor Intel Xeon E-2200 Processor 8th/9th Generation Intel Core i9 / Core i7 / Core i5 / Core i3 / Pentium / Celeron Processor
  • North Bridge: Intel C246
  • Model #: MBD-X11SCA-F-O
SUPERMICRO MBD-X11SPM-TF-O Micro ATX Server Motherboard LGA 3647 Intel C622
Quick View
SUPERMICRO MBD-X11SPM-TF-O Micro ATX Server Motherboard LGA 3647 Intel C622

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 3647
  • CPU Type: Supports 1st / 2nd Gen Intel Xeon Scalable Processors
  • North Bridge: Intel C622
  • Model #: MBD-X11SPM-TF-O
SUPERMICRO MBD-X11SPL-F-O ATX Server Motherboard LGA 3647 Intel C621
Quick View
SUPERMICRO MBD-X11SPL-F-O ATX Server Motherboard LGA 3647 Intel C621

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 3647
  • CPU Type: Supports 2nd Gen Intel Xeon Scalable Processors and Intel Xeon Scalable Processors
  • North Bridge: Intel C621
  • Model #: MBD-X11SPL-F-O
SUPERMICRO MBD-X11SSA-F-O ATX Server Motherboard LGA 1151 Intel C236
Quick View
SUPERMICRO MBD-X11SSA-F-O ATX Server Motherboard LGA 1151 Intel C236

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1151
  • CPU Type: Supports: Intel 7th / 6th Generation Core i3 series Intel Xeon processor E3-1200 v6/v5 Intel Celeron Intel Pentium
  • North Bridge: Intel C236
  • Model #: MBD-X11SSA-F-O
SUPERMICRO MBD-X11SSL-F-O Micro ATX Server Motherboard LGA 1151 Intel C232
Quick View
SUPERMICRO MBD-X11SSL-F-O Micro ATX Server Motherboard LGA 1151 Intel C232

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1151
  • CPU Type: Supports: Intel 7th/6th Generation Core i3 series Intel Xeon processor E3-1200 v6/v5 Intel Celeron Intel Pentium
  • North Bridge: Intel C232
  • Model #: MBD-X11SSL-F-O
  •  
  • $254.99 
  • Free Shipping
SUPERMICRO MBD-X12SCA-5F-O ATX Workstation Motherboard LGA 1200 Intel W580
Quick View
SUPERMICRO MBD-X12SCA-5F-O ATX Workstation Motherboard LGA 1200 Intel W580

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1200
  • CPU Type: Supports: 11th Generation Intel Core i5/i7/i9 Processors Intel Xeon W-1200 Processors Intel Xeon W-1300 Processors 10th Generation Intel Core i9/Core i7/Core i5/Core i3 Processor
  • North Bridge: Intel W580
  • Model #: MBD-X12SCA-5F-O
SUPERMICRO MBD-X11SPA-TF-O Extended ATX Server Motherboard LGA 3647 Intel C621
Quick View
SUPERMICRO MBD-X11SPA-TF-O Extended ATX Server Motherboard LGA 3647 Intel C621

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 3647
  • CPU Type: Supports 1st / 2nd Gen Intel Xeon Scalable Processors
  • North Bridge: Intel C621
  • Model #: MBD-X11SPA-TF-O
SUPERMICRO MBD-X11SPM-F-O Micro ATX Server Motherboard LGA 3647 Intel C621
Quick View
SUPERMICRO MBD-X11SPM-F-O Micro ATX Server Motherboard LGA 3647 Intel C621

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 3647
  • CPU Type: Supports 1st / 2nd Gen Intel Xeon Scalable Processors
  • North Bridge: Intel C621
  • Model #: MBD-X11SPM-F-O
SUPERMICRO MBD-X12STL-F-O Micro ATX Server Motherboard LGA 1200 Intel C252
Quick View
Supermicro
SUPERMICRO MBD-X12STL-F-O Micro ATX Server Motherboard LGA 1200 Intel C252

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1200
  • CPU Type: Supports 10th Generation Intel Pentium Processor, Intel Xeon E-2300 Processor
  • Number of Processor Support: 1
  • Model #: MBD-X12STL-F-O
SuperMicro MBD-H11SSL-C-O ATX Server Motherboard EPYC 7000-series (Retail Pack)
Quick View
SuperMicro MBD-H11SSL-C-O ATX Server Motherboard EPYC 7000-series (Retail Pack)

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: Socket SP3
  • CPU Type: Single AMD EPYC 7000-series Processor Socket SP3
  • DDR4 Standard: DDR4 2666 MHz Registered ECC, 288-pin gold-plated DIMMs
  • Model #: MBD-H11SSL-C-O
  •  
  • $659.00 
  • Free Shipping
SUPERMICRO MBD-X12DAI-N6-O Extended ATX Server Motherboard LGA 4189 Intel C621A
Quick View
SUPERMICRO MBD-X12DAI-N6-O Extended ATX Server Motherboard LGA 4189 Intel C621A

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 4189
  • CPU Type: Supports 3rd Gen Intel Xeon Scalable processors
  • North Bridge: Intel C621A
  • Model #: MBD-X12DAI-N6-O
SUPERMICRO MBD-X11SSQ-O Micro ATX Server Motherboard LGA 1151 Intel Q170 DDR3 1600
Quick View
Supermicro
SUPERMICRO MBD-X11SSQ-O Micro ATX Server Motherboard LGA 1151 Intel Q170 DDR3 1600

OUT OF STOCK

  • Brand: SUPERMICRO
  • CPU Socket Type: LGA 1151
  • CPU Type: Intel 6th Gen Core i7 / i5 / i3 series, Intel Celeron, Intel Pentium processors CPU TDP support up to 95W TDP
  • North Bridge: Intel Q170
  • Model #: MBD-X11SSQ-O