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Micro-ATX server board with four SFP28 and four RJ45 ports

ASRock Rack

ASRock Rack D1749NTD4U-4T4O Xeon D-1749NT server motherboard 4 SFP28 4 RJ45 10GbE

SKU CH-G3C2-EGZG4 MPN D1749NTD4U-4T4O

Micro-ATX server board with an integrated Xeon D-1749NT, four DDR4 slots for 128 GB ECC memory, and eight 10 GbE ports

  • CPU TypeIntel Xeon D-1749NT processor
  • Number of Processor Support1
  • CPU FeaturesThermal Design Power Up to 90W
  • Number of DDR4 Slots4 x 288-pin
  • DDR4 StandardDDR4 2666
  • Maximum Memory Supported128GB
  • Integrated Xeon D-1749NT delivers up to 90W TDP performance
  • Four DDR4 slots support 128GB ECC registered memory at 2666
  • Four SFP28 plus four RJ45 ports provide eight 10GbE links
  • PCIe 4.0 x16 slot or dual SlimSAS for flexible expansion
  • Dual M.2 slots with 22110/2280 support for fast storage

Built-in Xeon D-1749NT for dense 1U builds

This Micro-ATX server motherboard integrates an Intel Xeon D-1749NT processor with a 90W thermal design power. Four 288-pin DDR4 slots accept registered ECC memory up to 128GB at 2666 MT/s. The board targets builders who need high core density in a 9.6-inch square footprint without a separate CPU cooler mount.

Eight 10GbE ports and flexible PCIe lane sharing

The rear I/O provides four RJ45 and four SFP28 connections driven by an Intel X557-AT4 controller, all operating at 10Gbps. A PCIe 4.0 x16 slot shares lanes with two SlimSAS connectors, while a PCIe 3.0 x8 slot can switch to two Mini-SAS HD ports. Two M.2 sockets support 2280 or 22110 drives, with the second M.2 disabling four SATA ports when populated.

Single-socket SoC limits upgrade paths

The soldered Xeon D-1749NT means the processor cannot be replaced or upgraded later. Buyers who want a socketed CPU for future generation swaps or higher core counts must choose a different platform.

Highlights

  • Integrated Xeon D-1749NT delivers up to 90W TDP performance
  • Four DDR4 slots support 128GB ECC registered memory at 2666
  • Four SFP28 plus four RJ45 ports provide eight 10GbE links
  • PCIe 4.0 x16 slot or dual SlimSAS for flexible expansion
  • Dual M.2 slots with 22110/2280 support for fast storage

Specifications

BrandAsRock Rack
ModelD1749NTD4U-4T4O
CPU TypeIntel Xeon D-1749NT processor
Number of Processor Support1
CPU FeaturesThermal Design Power Up to 90W
Number of DDR4 Slots4 x 288-pin
DDR4 StandardDDR4 2666
Maximum Memory Supported128GB
ECC SupportedYes
RegisteredYes
PCI Express 4.0 x16SLOT7*: PCIe4.0 x16 [CPU]
*SLOT7 shares lanes with 2 SlimSAS.
-Slimline1 and Slimline2 will disable when SLOT7 (PCIe4.0 x16) is populated
-Slimline1 will disable when SLOT7 (PCIe4.0 x8) is populated.
PCI Express x8SLOT6*: PCIe3.0 x8 [CPU]
*SLOT6 shares lanes with 2 Mini-SAS HD by BIOS setting
Other Slots2 SlimSAS* (PCIe4.0 x8) [CPU]
*SLOT7 shares lanes with 2 SlimSAS.
-Slimline1 and Slimline2 will disable when SLOT7 (PCIe4.0 x16) is populated
-Slimline1 will disable when SLOT7 (PCIe4.0 x8) is populated
M.2M2_1 (PCIe3.0 x4 or SATA 6Gb/s); support 22110/2280 form factor [CPU]
M2_2* (PCIe3.0 x4 or SATA 6Gb/s); support 22110/2280 form factor [CPU]
*M2_2 shares lanes with 4 SATA 7-pin; 4 SATA 7-pin will disable when M2_2 is populated
Onboard Video ChipsetAspeed AST2500
LAN ChipsetIntel X557-AT4
LAN Speed10Gbps
Max LAN Speed8 x 10Gbps
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) / 4 x LAN (SFP28)
Onboard USBUSB 3.2 (Gen1) Header: 1 header (19-pin, 2 USB3.2 Gen1)
Other ConnectorsPower Connector: 1 Micro-Fit (4-pin, ATX PSU signal) w/ ATX 24-pin adapter cable, 2 ( 8-pin, ATX 12V) support 12V DC-in
Other Power Connectors: 1 (6-pin, SATA power)
Auxiliary Panel Header: 1 (18-pin): chassis intrusion, LAN1/LAN2 activity LED, locate, SMBus
System Panel: 1 (9-pin): power switch, reset switch, system power LED, HDD activity LED
VGA header: 1 (15-pin)
Fan Header: 1 (4-pin, CPU fan), 5 (6-pin, SYS fans)
TPM Header: 1 (13-pin, SPI)
VROC header: 1
SGPIO Header: 1
HSBP: 1
SMBus header: 1
PMBus header: 1
IPMB Header: 1
Clear CMOS: 1
Others: 1 header (17-pin, external 80 de
BIOS FeatureAMI UEFI BIOS; 512 Mb (64MB) SPI Flash ROM
Plug and Play (PnP), ACPI 3.0 and above compliance wake up events, SMBIOS 3.2 and above, ASRock Rack Instant Flash
Form FactorMicro ATX
Dimensions (W x L)9.6" x 9.6"
Shipping weight1.52 kg
Package size305 × 292 × 70 mm

Questions about this item

What PCIe standard does the SLOT7 x16 slot use and what bandwidth does it cap at?

SLOT7 runs at PCIe 4.0 x16 and caps at the 4.0 x16 bandwidth; it shares lanes with the two SlimSAS connectors.

What chassis dimensions and mounting pattern does this Micro-ATX board need?

The board measures 9.6" x 9.6" and uses the standard Micro-ATX mounting holes for a compatible chassis.

How is the Xeon D-1749NT processor installed on this motherboard?

The Xeon D-1749NT is soldered directly to the board, so no socket installation or cooler mounting is required.

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