DFI CMS631-H420EC Intel Comet Lake Core Industrial ATX Motherboard with H420E Chipset, Dual LAN and Seven Expansion Slots

Replacing the host in an older machine often means finding a board that still takes its PCI cards, where memory and remote management matter less than the slot count. The CMS631-H420EC is the H420E build of the CMS631 series, an ATX industrial motherboard with five PCI slots, six COM ports and an LGA1200 socket for 10th Gen Intel Core (Comet Lake).

The socket takes Core i3, i5, i7 and i9 processors, from the four-core i3-10100E to the 10-core i9-10900TE at 35 W, plus the Pentium G6400E and Celeron G5900E and G5900TE for simple control tasks, with DFI rating the socket up to 125 W. Two DDR4 2933 MHz DIMM slots take up to 64 GB. Intel UHD Graphics drives any two of VGA, DP++ and HDMI at once, enough for an HMI screen and a service monitor. The H420E build has no Intel AMT or vPro.

Expansion is a PCIe x16 Gen3 slot, a PCIe x4 Gen3 slot and five PCI slots behind a PCIe-to-PCI bridge. Two RS-232/422/485 ports, one on a rear DB-9, and four RS-232 headers connect instruments and PLCs, with 16-bit digital I/O for relays and indicators. Two GbE ports use Intel I210AT and I219V controllers, four SATA 3.0 ports and an M.2 M-key socket take SATA SSDs, and the rear panel has four USB 3.2 Gen 1 and two USB 2.0 Type-A ports, with four more USB ports on headers.

The CMS631-H420EC runs from a standard ATX supply over 24-pin and 8-pin connectors across -5 to 65 °C, with optional TPM 2.0, a watchdog timer and CE, FCC, UKCA and RoHS compliance. For NVMe storage, six SATA ports with RAID, triple displays, up to 128 GB and Intel AMT, choose the CMS631-Q470ECRM.