Which GPUs does the HPE ProLiant Compute XD685 support?
One eight-GPU board per server: NVIDIA HGX H200 141GB, NVIDIA B200 192GB, NVIDIA HGX B300 288GB or AMD Instinct MI355X 288GB, as HPE names them. The H200 comes air-cooled or liquid-cooled; the other three are direct liquid cooled only.
Is the XD685 air-cooled or liquid-cooled?
Both, depending on the board. The air-cooled base (S4Q28A) is 6U and takes the H200; the DLC bases are 5U — S4R96A for H200 and B200 DLC, and S6Y07A for the HGX B300. Liquid-cooled boards need their matching HPE kit.
What CPUs does the XD685 use?
A matched pair of 5th Gen AMD EPYC 9005 processors, chosen from nine models spanning 32 to 96 cores and 280 W to 400 W. Single-processor builds and mixed models are not supported.
How much memory does the XD685 take?
Up to 3.0 TB, reached by fitting 128 GB DDR5-6400 RDIMMs in all 24 slots at one module per channel. HPE also lists 64 GB and 96 GB kits and warns that the 128 GB kit may be hard to obtain at a sensible price.
How many PCIe slots does the XD685 have?
Twelve PCIe Gen 5.0 x16 slots: eight half-height, half-length slots attached to the GPUs and four full-height, half-length slots for fabric, NIC or DPU cards. HPE’s document lists no OCP slot.
How many power supplies does the XD685 need?
Servers with B200, B300 or MI355X boards default to twelve 3000 W Titanium supplies, and ten are permitted where rack space is short. B200 also has a six-supply base kit with an optional step up to twelve for N+3. Each supply takes 200–277 V AC.
How much storage does the XD685 hold?
Eight E3.S NVMe drives on the PCIe switches, or twelve when the SR932i-p controller serves bays 9 to 12 — up to 184.32 TB with 15.36 TB drives. The operating system boots from an NS204i-u holding two mirrored M.2 SSDs.
How big and heavy is the XD685?
It is 1049 mm long and 448 mm wide, and 217.7 mm high as a 5U DLC system or 261.95 mm as 6U air. It weighs 40.15 kg empty and 103 kg fully loaded, and HPE requires a customer-provided lift for break-fix visits.
How does the XD685 differ from the XD690?
The XD685 uses AMD EPYC processors, offers four GPU boards and is mostly liquid-cooled in 5U, with a 6U air option for H200. The XD690 is a 10U air-cooled system with Intel Xeon 6 processors and the HGX B300 board only, and its twelve supplies are fixed in the chassis.
Is the HPE ProLiant Compute XD685 end of life?
HPE was still adding options in the August 2026 revision of its QuickSpecs, first issued in January 2025, and the document gives no end-of-sale or end-of-support date. Any dates HPE announces later are added to our server end-of-life checker.
