Can the Dell PowerEdge XE8712 run as a standalone server?
No. It is a 1 OU compute tray with no power supplies of its own: it takes DC power from the busbar and coolant from the DLC manifolds of a Dell IR7044 or IR7050 Open Rack v3 cabinet, blind-mating to both as it slides in. The rack also carries the power shelves, management and fabric switches and a rack PDU, with a CDU alongside, and Dell requires at least three trays per rack.
How many GPUs and CPUs does each XE8712 tray have?
Two NVIDIA Grace processors with 72 cores each and four Blackwell Ultra GPUs with 192 GB of HBM3e each. Dell rates the NVLink link between CPUs and GPUs at 900 GB/s of coherent memory. The guide lists a single processor and GPU complement, so those parts are the same in every tray.
How many XE8712 trays fit in a rack?
Dell supports between 3 and 36 XE8712 trays in one 50 OU IR7050 rack. At four GPUs per tray, 36 trays give the 144 Blackwell GPUs per rack quoted in Dell’s spec sheet, which also cites up to 264 kW per rack.
How much memory does the XE8712 have?
Each tray has 960 GB of LPDDR5X with ECC — 480 GB soldered to each Grace processor — plus 192 GB of HBM3e on each of its four GPUs. There are no DIMM slots, and Dell supports no DIMM or CXL 2.0 memory expansion, so the capacity you buy is the capacity you keep.
How is the XE8712 powered?
From the rack. ORv3 33 kW power shelves, each holding six 5500 W AC power supplies, feed a 1400 A busbar and the tray takes up to 54 VDC from it. Dell sizes shelves by tray count: eight shelves serve 29–33 trays with N+1 redundancy for AI, or 31–36 trays with half-shelf redundancy for HPC.
Is the XE8712 liquid-cooled?
Yes, for the CPUs and GPUs. Two cold plates connect through inner manifolds to quick-disconnects at the rear of the tray, which blind-mate to the rack’s 21-inch DLC manifolds, and each OU can hand up to 10 kW to the liquid. Eight HPR Gold fans still cool the remaining parts, with ambient air allowed up to 40 °C.
What storage does the XE8712 support?
Up to two hot-plug EDSFF E3.S NVMe drives at the front, each on a Gen5 x4 link through a PCIe switch, and one M.2 boot drive on an interposer; diskless trays are supported too. There is no SAS, SATA or U.2 support and no HBA or PERC, and Dell’s spec sheet lists the E3.S bays as not available at launch.
What PCIe slots and networking does the XE8712 have?
Up to four full-height, half-length PCIe Gen5 x16 slots on front risers, with the count set by the riser configuration (Dell documents six), alongside one OCP 3.0 Gen5 x16 slot. For the fabric Dell lists CX7 x16 or CX8 OSFP options, plus one BlueField-3 SuperNIC, and a Mellanox 2 × 25GbE SFP28 OCP card.
How loud is the XE8712?
Dell describes it as a server for unattended data centres and advises against deploying it near people. In its tests the tray measured 51 to 67 dB(A) at the bystander position at 25 °C, depending on configuration, and 64 to 79 dB(A) under maximum load at 35 °C. The guide calls for industrial-grade ear protection when working near it.
Is the Dell PowerEdge XE8712 end of life?
Dell’s technical guide gives no end-of-sale or end-of-service date for the XE8712, and PowerEdge XE servers come with a three-year hardware warranty that ProSupport can extend. Our server end-of-life checker records vendor dates when Dell publishes them.
