Where does the ATX power supply plug in? I don't see either a 20 or 24-pin connector....

This board comes with a 24-to-4 pin ATX 12V adapter needed to power-on the system using the front panel switch. It also requires an additional ATX 12V 4-pin connection for CPU power

Does anyone know if the "optional" 1x Oculink 4 SATA cable is actually included in this SKU? Is there a way to order if not? If neither, has anyone tried using the Supermicro CBL-SAST-0933 with this board?

The Oculink-to-SATA cable is not included in the retail package. I purchased the Supermicro CBL-SAST-0933 cable and it works just fine.

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AsRock Rack EPYC3251D4I-2T Mini-ITX Server Motherboard AMD EPYC 3251 SoC 8 Cores Dual 10 GLAN

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Mini-ITX 6.7" x 6.7"
Support AMD EPYC 3251 Processor, SoC
Support 4 x DIMM slots, DDR4 ECC / UDIMM, RDIMM up to 2667 MT/s; 2DPC
Support 1 x PCIe 3.0 x 16
Support up to 1 x OCulinks (PCIe 3.0 x4 or 4 x SATA III 6Gb/s) + 2 x SATA III 6.0Gb/s
Support 1 x M.2 (PCIe3.0 x4 and SATA3 shared with SATA_4 port) up to 22110 form factor
Support 2 x 10GLAN RJ45 by Intel X550-AT2 + 1 x Dedicated LAN IPMI
Supports 12V DC or ATX Power Source

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Overview

Specs

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MEMORY QVL

8GB DDR4 2666 non-ECC	Kingston KVR26N19S8/8
32GB DDR4 2666 RDIMM	Crucial CT32G4RFD4266-2G6H1.001
16GB DDR4 2666 ECC	Kingston KSM26ED8/16ME
32GB DDR4 2400 RDIMM	Kingston KVR24R17D4/32
16GB DDR4 2133 ECC	Crucial CT16G4WFD8213.18FB1

64GB DDR4 2666 RDIMM	Crucial CT64G4YFQ426S.36DG1
16GB DDR4 2666 non-ECC	Crucial CT16G4DFD8266.C16FD1
32GB DDR4 2400 LRDIMM	Crucial CT32G4LFD424A.36FB1
16GB DDR4 2400 ECC	Crucial CT16G4WFD824A.18FB1

TPM QVL

TPM 2.0, LPC, 13 pin	INFINEON SLB9665, TPM2-SLI

Model
Brand	AsRock Rack
Model	EPYC3251D4I-2T

Supported CPU
CPU Type	Support AMD EPYC 3251 (8 cores, 16 threads)
Number of Processor Support	1

Chipsets
North Bridge	Soc

Memory
Number of DDR4 Slots	4 x 288-pin
DDR4 Standard	ECC / UDIMM: 2133 / 2400 / 2666 MHz RDIMM: 2133 / 2400 / 2666 MHz
Maximum Memory Supported	Max. Capacity per DIMM ECC UDIMM, RDIMM, LRDIMM: up to 128GB
Channel Supported	Dual Channel
ECC Supported	Yes
Registered	Yes

Expansion Slots
PCI Express 3.0 x16	SLOT7: PCIe3.0 x16

Storage Devices
SATA	AMD Built-in Storage: 6 x SATA III 6.0 Gb/s (4 x SATA from OCulink, 2 x SATA III 6.0 Gb/s)
M.2	1 x M-Key (PCIe3.0 x4 or SATAIII 6.0 Gb/s); Supports 22110/2280 form factor

Onboard Video
Onboard Video Chipset	Aspeed AST2500

Onboard LAN
LAN Chipset	Intel X550-AT2
LAN Speed	10Gbps
Max LAN Speed	2 x 10Gbps

Rear Panel Ports
Back I/O Ports	UID Button/LED: 1 VGA Port: D-sub x 1 USB 3.2 Gen1 Port: 2 RJ45: - 2 x 10GLAN RJ45(by Intel X550-AT2 ) - 1 x RJ45 Dedicated IPMI LAN port - LAN Ports with LED (ACT/LINK LED and SPEED LED)

Onboard Ports
Onboard USB	USB 3.2 (Gen1) Header: 1 (supports 2 USB 3.1 Gen1 ports)
Other Connectors	Power Connector: 1 x (4-pin) + 1 x (8-pin) support 12V DC-IN Other Power Connectors: 1 (4-pin) for HDD power Auxiliary Panel Header: 1 (include chassis intrusion, 2 front LAN LED, System LED) System Panel: 1 COM Header: 1 Fan Header: 1 x CPU Fan, 2 x System Fans (1 front, 1 rear) (build in CPU active fansink) TPM Header: 1 x (13-pin) SGPIO Header: 1 SMBus header: 1 PMBus header: 1 IPMB Header: 1 Clear CMOS: 1 (short pad)

Dimensions
Form Factor	Mini ITX
Dimensions (W x L)	6.7" x 6.7"

Additional Information
First Listed on Newegg	October 02, 2019

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Warranty

Limited Warranty period (parts): 3 years
Limited Warranty period (labor): 3 years
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AsRock Rack EPYC3251D4I-2T Mini-ITX Server Motherboard AMD EPYC 3251 SoC 8 Cores Dual 10 GLAN

Learn more about the ASRock Rack EPYC3251D4I-2T

Customer Reviews of the ASRock Rack EPYC3251D4I-2T

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Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Item#: N82E16813140038

AsRock Rack EPYC3251D4I-2T Mini-ITX Server Motherboard AMD EPYC 3251 SoC 8 Cores Dual 10 GLAN

Learn more about the ASRock Rack EPYC3251D4I-2T

Customer Reviews of the ASRock Rack EPYC3251D4I-2T

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info