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Green micro-ATX server board with LGA 1151 socket, four DDR4 slots, three PCIe slots, eight SATA ports, dual LAN, HDMI, DisplayPort

ASRock Rack

ASRock Rack C246M WS LGA 1151 Micro ATX server motherboard

SKU CH-7TGJ-MRT0D MPN C246M WS

Micro ATX server board for Intel Xeon E-2100 and E-2200 CPUs with dual-channel DDR4 ECC support up to 64 GB, eight SATA3 ports and three PCIe 3.0 slots

  • CPU TypeSupports Intel Xeon E-2100 / E-2200 Series Processors
  • North BridgeIntel C246
  • DDR4 StandardSupports DDR4 2666 / 2400 ECC / non-ECC U DIMM
  • Maximum Memory Supported64GB
  • Channel SupportedDual Channel
  • PCI Express 3.0 x16SLOT6: Gen3 x16 link, auto switch to x8 link if SLOT4 is occ
  • Supports Intel Xeon E-2100 and E-2200 series CPUs for server workloads
  • Dual-channel DDR4 2666/2400 with ECC and non-ECC up to 64 GB capacity
  • Eight SATA3 6 Gb/s ports from the C246 chipset for storage arrays
  • Three PCIe 3.0 slots at x16, x8 and x4 for add-in cards
  • Dual Intel i210 and i219LM Gigabit LAN ports for network redundancy

Micro ATX server board for Xeon E-2100

The C246M WS fits the LGA 1151 socket and Intel C246 chipset into a 9.6 by 9.6 inch form factor. It targets system integrators who need ECC memory support and multiple drive ports in a compact chassis. Four DIMM slots accept DDR4 2666 or 2400 U DIMM modules up to 64 GB total.

PCIe lane sharing limits the x16 slot when the x8

SLOT6 runs at Gen3 x16 but drops to x8 if SLOT4 is occupied, while SLOT5 provides a Gen3 x4 link. The C246 controller delivers eight SATA3 6 Gb/s ports, though SATA0 shares bandwidth with the M.2 PCIe 3.0 x4 interface. Dual Intel i210 and I219LM controllers provide two RJ45 gigabit LAN ports.

Standard Micro ATX mounting aligns

The board uses a conventional 24-pin ATX plus 8-pin EPS power layout and front-panel headers in familiar positions. Builders must choose between SATA DOM on SATA0 or an M.2 PCIe drive because they share the same channel. HDMI, D-Sub, DisplayPort and a serial port give headless or local display options.

Highlights

  • Supports Intel Xeon E-2100 and E-2200 series CPUs for server workloads
  • Dual-channel DDR4 2666/2400 with ECC and non-ECC up to 64 GB capacity
  • Eight SATA3 6 Gb/s ports from the C246 chipset for storage arrays
  • Three PCIe 3.0 slots at x16, x8 and x4 for add-in cards
  • Dual Intel i210 and i219LM Gigabit LAN ports for network redundancy

Specifications

BrandAsRock Rack
ModelC246M WS
CPU TypeSupports Intel Xeon E-2100 / E-2200 Series Processors
North BridgeIntel C246
DDR4 StandardSupports DDR4 2666 / 2400 ECC / non-ECC U DIMM
Maximum Memory Supported64GB
Channel SupportedDual Channel
PCI Express 3.0 x16SLOT6: Gen3 x16 link, auto switch to x8 link if SLOT4 is occupied
PCI Express x8SLOT4: Gen3 x8 link
PCI Express x4SLOT5: Gen3 x4 link
SATAC246: 8 x SATA3 6Gb/s (SATA0-7, SATA0 support support SATA DOM, and share with M.2 (PCIE 3.0 (X4) ) / SATA3)
Number of LAN2 x RJ45 GLAN by Intel i210 & I219LM
Video Ports1 x HDMI
1 x D-Sub
1 x Serial Port
1 x Display Port
USB 3.14 x USB 3.1
S/PDIF Out1 x Optical
Audio Ports1 x Port (3 Jack)
FeaturesSupports Intel Xeon E-2100 Processors
Supports Dual channel DDR4 2666 / 2400 ECC and non-ECC U DIMM max 64GB
Support 8 x SATA3 by C246
Supports 1 x PCIe 3.0 x16, 1 x PCIe 3.0 x8, 1 x PCIe 3.0 x4
Supports Intel i210 & i219LM
Form FactorMicro ATX
Dimensions (W x L)9.6" x 9.6"
Shipping weight1.07 kg
Package size305 × 287 × 74 mm

Questions about this item

Should I choose ECC or non-ECC DDR4 for the 64 GB limit?

Both ECC and non-ECC unbuffered DDR4 DIMMs are supported up to 64 GB in dual-channel mode across the four slots.

What does the 2666 MHz DDR4 rating mean once the board is running?

Memory will operate at up to 2666 MHz when compatible Xeon E-2100 or E-2200 processors are installed; otherwise it falls back to 2400 MHz.

How does the PCIe 3.0 x16 slot behave when the x8 slot is populated?

The primary x16 slot runs at Gen3 x16 but automatically drops to x8 electrical if the second x8 slot is occupied.

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