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Green rectangular ATX server motherboard with silver LGA 1700 socket, four black DDR5 slots, four copper RJ45 ports

ASRock Rack

ASRock Rack EC266D4-4L server motherboard LGA 1700 DDR5 4x 1G LAN

SKU CH-WGQ4-J8Z0E MPN EC266D4-4L

ATX server board with LGA 1700 socket, four DDR5 ECC slots, 14 SATA ports, four 1 GbE ports and IPMI remote management

  • CPU Socket TypeLGA 1700
  • CPU TypeSupports Intel Xeon E-2400 series and Intel Pentium Gold G74
  • Number of Processor Support1
  • CPU FeaturesThermal Design Power 95W
  • North BridgeIntel C266
  • Memory Slots4 x DDR5 288-pin
  • Supports Intel Xeon E-2400 series processors on LGA 1700 socket
  • Four DDR5 288-pin slots with ECC support up to 128 GB
  • Four 1 GbE LAN ports via Intel I210 controllers
  • PCIe 5.0 x16 and x8 slots plus two PCIe 4.0 x4 slots
  • Two M.2 PCIe 4.0 x4 slots supporting 2280/2260/2242/2230 form factors

Server motherboard with four 1 GbE ports

The ASRock Rack EC266D4-4L is an ATX server motherboard built around the Intel C266 chipset and the LGA 1700 socket. It supports a single Intel Xeon E-2400 series processor or an Intel Pentium Gold G7400/G7400T with a thermal design power of 95 W. The board provides four DDR5 288-pin slots running at 4400 MT/s with ECC, up to 128 GB total.

Builders needing four copper 1 GbE links

This board suits systems that require four RJ45 ports driven by Intel I210 controllers and two M.2 connectors each wired for PCIe 4.0 x4. It also delivers one PCIe 5.0 x16 slot, one PCIe 5.0 x8 slot and two PCIe 4.0 x4 slots for add-in cards. Buyers who need 10 GbE or faster onboard networking should consider other platforms.

The shared-lane arrangement between the two top

SLOT6 operates at PCIe 5.0 x16 when SLOT4 is empty, but drops to x8 as soon as SLOT4 is populated. This single constraint decides whether the motherboard can host two full-bandwidth expansion cards simultaneously.

Points forts

  • Supports Intel Xeon E-2400 series processors on LGA 1700 socket
  • Four DDR5 288-pin slots with ECC support up to 128 GB
  • Four 1 GbE LAN ports via Intel I210 controllers
  • PCIe 5.0 x16 and x8 slots plus two PCIe 4.0 x4 slots
  • Two M.2 PCIe 4.0 x4 slots supporting 2280/2260/2242/2230 form factors

Caractéristiques

BrandAsRock Rack
ModelEC266D4-4L
CPU Socket TypeLGA 1700
CPU TypeSupports Intel Xeon E-2400 series and Intel Pentium Gold G7400/G7400T processors
Number of Processor Support1
CPU FeaturesThermal Design Power 95W
North BridgeIntel C266
Memory Slots4 x DDR5 288-pin
Memory StandardDDR5 4400
Maximum Memory Supported128GB
ECC SupportedYes
PCI Express 5.0 x16SLOT6: PCIe5.0 x16* [CPU]
*SLOT6 share lanes with SLOT4. SLOT6 will switch to x8 when SLOT4 is populated
PCI Express x8SLOT4: PCIe5.0 x8* [CPU]
PCI Express x4SLOT7: PCIe4.0 x4 [CPU]
SLOT2: PCIe4.0 x4 [PCH]
M.21 M-key (PCIe4.0 x4); support 2280/2260/2242/2230 form factor [PCH]
1 M-key (PCIe4.0 x4); support 2280/2260/2242/2230 form factor [PCH]
Onboard Video ChipsetAspeed AST2600
LAN ChipsetIntel I210
LAN Speed10/100/1000Mbps
Max LAN Speed4 x 1Gbps
Back I/O Ports1 x COM (Serial Port) / 1 x D-Sub / 2 x USB 3.2 Gen 1 Type-A / 4 x LAN (RJ45)
Onboard USBUSB 3.2 (Gen1) Header: 2 header (19-pin, 4 USB3.2 Gen1)
USB 2.0 Header: 1 header (9-pin, 2 USB2.0)
Other ConnectorsPower Connector: 1 (24-pin, ATX main power), 3 (8-pin, ATX 12V)
Auxiliary Panel Header: 1 (18-pin): chassis intrusion, system fault LED, LAN1/LAN2 activity LED, locate, SMBus
System Panel: 1 (9-pin): power switch, reset switch, system power LED, HDD activity LED
VGA header: 1
Speaker Header: 1 (4-pin)
Buzzer: 1
Fan Header: 7 (4-pin)
Thermal Sensor Header: 1
TPM Header: 1 (13-pin, SPI)
SGPIO Header: 1
SMBus header: 1
PMBus header: 1
IPMB Header: 1
Clear CMOS: 1 (contact pads)
Front Lan LED Connector: 1
NMI Header: 1
BIOS FeatureAMI 256Mb SPI Flash ROM
Plug and Play, ACPI 6.4 and above compliance wake up events, SMBIOS 2.8 and above, ASRock Rack Instant Flash
Form FactorATX
Dimensions (W x L)12.0" x 9.6"
Poids d’expédition1.16 kg
Dimensions du colis356 × 305 × 76 mm

Questions sur cet article

What are the ATX dimensions of this motherboard?

The board measures 12 inches by 9.6 inches and follows the standard ATX form factor for server chassis mounting.

How do I install the LGA 1700 CPU and DDR5 memory correctly?

Align the processor notches with the socket keys, lower the retention lever gently, then press each DDR5 ECC UDIMM into the 288-pin slots until the side clips click.

Which TPM modules are validated for the 13-pin SPI header?

The qualified list includes Infineon SLB9672VU20 and SLB9670VQ2.0 modules for the onboard TPM SPI connector.

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