Are this motherboards only compatible with the Intel Xeon processor E3-1200 v3 and Haswell i3, or can it be used with more than just those two 1150 socket CPUs?

There is a complete cpu support list on the asrockrack site, if you visit the page for the C226M WS. Most cpus are Haswell, but there are 3 Broadwell xeons they also support on this board: E3-1285 v4(G0) E3-1285L v4(G0) E3-1265L v4(G0) Only those.

I have a question regarding OS compatibility. ASRock states that the since it is a workstation board the list of operating systems (Windows only) does not include linux distributions. I am interested in whether anyone has any linux server distributions installed and running on a build with this motherboard? I am particularly interested in any information on CentOS7 used with this board.

I'm using this with FreeNAS wich is FreeBSD and it works fine. Haven't really messed with Linux though. You can take the compatibility charts on the asrock site with a grain of salt. I'm using other components that aren't supposed to be compatible but work fine, such as Ram that's not listed on their charts.

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ASRock C226M WS Micro ATX Server Motherboard LGA 1150 DDR3 1600 / 1333

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LGA 1150
Intel C226
4 x 240pin

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ASRock Server Motherboard C226M WS

Features

Micro-ATX 9.6 x 9.6"
Single socket H3 (LGA 1150)
Supports 4th Gen & 5th Generation Intel Core™ Processors (Socket 1150)
4 x DIMM DDR3 1600/1333 ECC & UDIMM, max. 32GB
1 x PCIe 3.0 x16, 1 x PCIe 3.0 x8, 1 x PCIe 2.0 x4, 1 x M.2 slot
6 x SATA3 by Intel C226, support RAID 0, 1, 5, 10
Supports SATA Express (Port 5)
Intel i210 + i217LM, support Dual GLAN with Intel vPro technology
4 x USB 3.0 ports (2 rear + 2 via header )
6 x USB 2.0 ports (4 rear + 2 via header )

Specifications

Motherboard Physical Stats

Form Factor	Micro ATX
Dimensions	9.6 x 9.6" (24.4 x 24.4cm)

Processor System

CPU	Supports Intel® Xeon Processor E3-1200 v3 Product Family & Haswell i3 HDMI only works with certain Intel® E3 v3 CPUs(E3-1276 v3 /E3-1246 v3 /E3-1226v3 /E3-1275L v3 /E3-1286 v3/E3-1286L v3) Haswell i5/i7 Processor support is an extended advantage provided by ASRock Rack. When out of warranty, user's discretion is required.
Socket	Single socket H3 (LGA1150)
Chipset	Intel® C226

System Memory

Capacity	4 x 240-pin DDR3 DIMM slots Supports up to 32GB, unbuffered DIMM
Type	Dual Channel DDR3 1600/1333 UDIMM & ECC UDIMM Supports DDR3 1600/1333
Voltage	1.5V, 1.35V

Expansion Slots

PCIe 3.0 x16	1 slot (x16 or x8, switch with x8 slot)
PCIe 3.0 x8	1 slot (x0 or x8, switch with x16 slot)
PCIe 2.0 x4	1 slot
M.2	1 slot (shared with SATA Port 4 & Port 5)

Storage

SATA Controller	Intel® C226: 6 x SATA3 6.0Gbps Connectors, supports RAID (RAID 0, RAID 1, RAID 5, RAID 10, Intel® Rapid Storage Technology 13 and Intel® Smart Response Technology), NCQ, AHCI and Hot Plug Support SATA Express (SATA Port 5 & Port 4, shared with M.2 slot)

Audio

Audio Codec	Realtek ALC892

Ethernet

Interface	Gigabit LAN 10 / 100 / 1000Mbps
LAN Controller	Intel® i210 + Intel® i217LM (with Intel® vPro support) Supports Wake-On-LAN Supports Energy Efficient Ethernet 802.3az Supports Dual LAN with Teaming function Supports PXE

Graphics

Controller	Intel® HD Graphics Built-in Visuals and the VGA outputs can be supported only with processors which are GPU integrated
VRAM	Max. shared memory 1792MB
Output	Supports D-Sub with max. resolution up to 1920 x 1200 @ 60Hz

Rear Panel I/O

PS/2 KB/Mouse	1
VGA Ports	D-sub x 1, DVI x 1, HDMI x 1, Display port x 1
USB 3.0 Ports	2
USB 2.0 Ports	4
LAN Ports	2 x RJ45 Gigabit Ethernet LAN ports LAN Ports with LED (ACT/LINK LED and SPEED LED)
Audio	3 Jacks

Internal Connectors

COM Port Header	1 (COM1)
Power LED Header	1
Auxiliary Panel Header	1 (Includes chassis intrusion, front LAN LED)
TPM Header	1
Fan Header	5 x 4-pin
ATX Power	1 (24-pin) + 1 (8-pin)
USB 3.0 Headers	1 (each supports 2 USB 3.0)
USB 2.0 Headers	1 (each supports 2 USB 2.0)

System BIOS

BIOS Type	128Mb AMI UEFI Legal BIOS
BIOS Features	Plug and Play (PnP) ACPI 1.1 Compliance Wake Up Events SMBIOS 2.3.1 Support DRAM Voltage Multi-adjustment CPU Core, IGPU, DRAM, 1.8V PLL, VTT, VCCSA Voltage Multi-adjustment

Hardware Monitor

Temperature	CPU Temperature Sensing System Temperature Sensing
Fan	CPU/Rear/Front Fan Tachometer CPU Quiet Fan (Allow CPU Fan Speed Auto-Adjust by CPU Temperature) CPU/Rear/Front Fan Multi-Speed Control
Voltage	Voltage Monitoring: +12V, +5V, +3.3V, CPU Vcore

Supported Operating Systems

Operating System	Microsoft Windows Windows 7 (32- & 64-bit) Windows 8 (32- & 64-bit) Windows 8.1 (32- & 64-bit) Server 2012 R2 (64-bit)

Feature

Unique Features	ASRock Instant Flash

Environment

Temperature	Operation temperature: 32 - 95°F (10 - 35°C) / Non operation temperature: -40 - 158°F (-40 - 70°C)

Model
Brand	AsRock Rack
Model	C226M WS

Supported CPU
CPU Socket Type	LGA 1150
CPU Type	Supports Intel Xeon E3-1200 v3 / v4* and 5th/4th Generation Core i7 / i5 / i3/Pentium / Celeron Processors (Socket 1150) - Supports Hyper-Threading Technology - Supports Intel Turbo Boost 2.0 Technology BIOS version 2.0 or above is required HDMI only works with certain Intel E3 v3 CPUs(E3-1276 v3 / E3-1246 v3 / E3-1226v3 / E3-1275L v3 / E3-1286 v3 / E3-1286L v3) **Haswell i5/i7 processor support is an extended advantage provided by ASRock Rack. It is out of warranty; user's discretion is required

Chipsets
North Bridge	Intel C226

Memory
Number of DDR3 Slots	4 x 240pin
DDR3 Standard	DDR3 1600 / 1333
Channel Supported	Dual Channel
ECC Supported	Yes

Expansion Slots
PCI Express 3.0 x16	1 slot (x16 or x8, switch with x8 slot)
PCI Express x8	1 x PCIe 3.0 x8 slot (x0 or x8, switch with x16 slot)
PCI Express x4	1 x PCIe 2.0 x4 slot

Storage Devices
SATA	Intel C226: 6 x SATA3 6.0 Gb/s Connectors
SATA RAID	0/1/5/10

Onboard Audio
Audio Chipset	Realtek ALC892

Onboard LAN
Number of LAN	Intel i210 + Intel i217LM (with Intel vPro support)
LAN Speed	10/100/1000Mbps

Rear Panel Ports
PS/2	1
Video Ports	1 x D-sub, 1 x DVI, 1 x HDMI, 1 x Display port
RJ45	2 x RJ45 Gigabit Ethernet LAN ports LAN Ports with LED (ACT / LINK LED and SPEED LED)
USB 1.1/2.0	4 x USB 2.0
USB 3.0	2 x USB 3.0
Audio Ports	3 Jack

Features
Features	Micro ATX 9.6" x 9.6" Single socket H3 (LGA 1150) Supports New 4th and 5th Generation Intel Xeon E3-1200 v3 / Core i7 / i5 / i3 / Pentium / Celeron Processors (Socket 1150) 4 x DIMM DDR3 1600/1333 ECC & UDIMM, max. 32GB 1 x PCIe 3.0 x16, 1 x PCIe 3.0 x8, 1 x PCIe 2.0 x4, 1 x M.2 slot 6 x SATA3 by Intel C226, support RAID 0,1,5,10 Supports SATA Express (Port 5) Intel i210 + i217LM, support Dual GLAN with Intel vPro technology 4 x USB 3.0 ports (2 rear + 2 via header ) 6 x USB 2.0 ports (4 rear + 2 via header )

Additional Information
First Listed on Newegg	August 27, 2014

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Limited Warranty period (parts): 3 years
Limited Warranty period (labor): 3 years
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ASRock C226M WS Micro ATX Server Motherboard LGA 1150 DDR3 1600 / 1333

ASRock Server Motherboard C226M WS

Features

Specifications

Motherboard Physical Stats

Processor System

System Memory

Expansion Slots

Storage

Audio

Ethernet

Graphics

Rear Panel I/O

Internal Connectors

System BIOS

Hardware Monitor

Supported Operating Systems

Feature

Environment

Learn more about the ASRock Rack C226M WS

Customer Reviews of the ASRock Rack C226M WS

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Item#: N82E16813157561

ASRock C226M WS Micro ATX Server Motherboard LGA 1150 DDR3 1600 / 1333

ASRock Server Motherboard C226M WS

Features

Specifications

Motherboard Physical Stats

Processor System

System Memory

Expansion Slots

Storage

Audio

Ethernet

Graphics

Rear Panel I/O

Internal Connectors

System BIOS

Hardware Monitor

Supported Operating Systems

Feature

Environment

Learn more about the ASRock Rack C226M WS

Customer Reviews of the ASRock Rack C226M WS

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info