ASRock Rack has shown a single-socket server motherboard with 16 memory slots that can hold up to 4TB of DDR5, on a board about the size of a large enthusiast desktop one. It is made for Intel’s coming Diamond Rapids Xeon processors, and it has no ordinary PCIe card slots at all.
The DMRD16-2L+ was on show at the OCP Global Summit 2026. Each of the processor’s 16 memory channels gets one slot, so the memory ceiling depends on the module: 16 of the largest supported modules give the 4TB figure. The board follows the EEB layout, 12 by 13 inches.
The board’s headline numbers, as listed by ASRock Rack and noted by ServeTheHome, which looked at it on the show floor:
| Feature | DMRD16-2L+ |
|---|---|
| Memory slots | 16, one per channel |
| Standard server memory (RDIMM) | Up to 128GB per module, 8000MT/s |
| MRDIMM | Up to 128GB per module, 12800MT/s |
| MRDIMM 2U | Up to 256GB per module, 12800MT/s |
| Expansion | Up to 16 MCIO x8 connectors, 128 lanes in total |
| Storage | One PCIe 5.0 x4 M.2 slot |
| Networking | Two 1GbE ports plus a management port |
| Management chip | ASPEED AST2700 |
For storage there is the single M.2 socket, which takes 2260, 2280 and 22110 drives. Management goes through the ASPEED chip and its own network port, separate from the two data ports, apart from the two data ports.
The unusual part is the lack of slots. Every one of those connectors carries either PCIe 6.0 or CXL 3.0 traffic, and a server built on this board would link its drives, network cards and accelerators by cable, not by cards pushed into slots. ServeTheHome argues that this shows how hard it is to carry such fast signals across a circuit board. The board also lacks an OCP NIC 3.0 slot.
Ports are few. The rear panel has just two USB 3.2 Gen1 sockets and a VGA output. Two more USB ports sit on an internal header next to a video header, a COM header and a connector for a TPM security module.
Diamond Rapids is the Xeon family after Granite Rapids. It moves to 16 memory channels, up from 12 on the top Granite Rapids chips. Intel is sampling the processors and expects them to ramp in 2027, without a launch date.
ASRock Rack has not given a price or a date for the board.
