ASRock's cute new mini-ITX board supports 28C/56T Xeon CPU

ASRock Rack EPC621D4I-2M is a new mini-ITX LGA 3647 board that supports Intel's 28C/56T Xeon Scalable CPUs.

Published Mon, May 6 2019 10:20 PM CDT   |   Updated Tue, Nov 3 2020 11:48 AM CST

ASRock has made its new super-small but monster-packed ASRock Rack MITX EPC621D4I-2M motherboard that packs the Intel LGA 3647 socket that is capable of taking an Intel Xeon Scalable CPU.

ASRock's cute new mini-ITX board supports 28C/56T Xeon CPU 03 |

The new ASRock Rack MITX EPC621D4I-2M board uses the C621 chipset and is the smallest C621-based motherboard on the market, the smallest board capable of taking the latest Skylake-SP and Cascade Lake-SP processors in the Intel Xeon Scalable family of CPUs. The board can handle up to 128GB of DDR4 memory at up to 2666MHz while the new ASRock Rack MITX EPC621D4I-2M motherboard packs:

  • 2 x DIMM (128GB DDR4 RAM support)
  • 1 x PCIe 3.0 x16 slot
  • 2 x M.2 slots
  • 5 x SATA ports
  • 2 x USB 3.0 ports
  • 1 x RJ45 GbE
  • 1 x VGA connector
ASRock's cute new mini-ITX board supports 28C/56T Xeon CPU 04 |

The board can handle most CPUs apart from the high-end Xeon W-3175X because the ASRock Rack MITX EPC621D4I-2M supports CPUs at up to 205W, so the rest of the CPUs including other 28C/56T chips will be fine. While the Xeon W-3175X will work in the board, you'll hit that 205W TDP pretty quickly and see the CPU clocks drop quickly. I wouldn't bother.

ASRock cools the EPC621D4I-2M motherboard with a small heat sink with extended aluminum fans and a single 8-pin PCIe power connector.


Anthony joined the TweakTown team in 2010 and has since reviewed 100s of graphics cards. Anthony is a long time PC enthusiast with a passion of hate for games built around consoles. FPS gaming since the pre-Quake days, where you were insulted if you used a mouse to aim, he has been addicted to gaming and hardware ever since. Working in IT retail for 10 years gave him great experience with custom-built PCs. His addiction to GPU tech is unwavering.

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