Dell Precision 7920 Rack

Dell's 2U dual-socket rack workstation (Intel C621) with iDRAC9 remote management: one or two 1st/2nd-gen Xeon Scalable CPUs up to 28 cores each, 24 DIMM slots up to 3 TB, 8 hot-swap 3.5"/2.5" bays, 8 PCIe Gen 3 slots with up to three 300 W double-width GPUs, and 1100 W or 1600 W hot-plug PSUs. Built as a datacenter-hosted 1:1 remote workstation with the power of a 7920 Tower.

Memory

Slots: 24 DIMM (12 per CPU), 6 channels per CPU, 2 DIMMs per channel; B1-B12 need the second CPU
Type: DDR4 ECC RDIMM and LRDIMM (do not mix); UDIMMs not supported
DIMM sizes: 8, 16, 32 GB RDIMM; 64, 128 GB LRDIMM (guidebook); owner's manual: up to 128 GB per slot
Speeds: Skylake CPUs: up to 2666 MT/s; Cascade Lake: up to 2933 MT/s. 2933 memory drops to 2666 at 2 DIMMs per channel; runs slower with Gold 52xx (2666), Silver (2400) and Bronze (2133) CPUs
Minimum: 8 GB
Maximum: 3072 GB (two 'M' CPUs with 128 GB LRDIMMs); 768 GB with 2933 MT/s memory; spec sheet: 1.5 TB 2666 MHz with dual CPUs, 3 TB with select CPUs
Optane DCPMM: 128/256/512 GB modules at 2666 MT/s, Memory Mode only (not persistent) with select Cascade Lake CPUs; RDIMMs act as cache; up to 1.5 TB with 1 CPU, 6.0 TB with 2 CPUs
Population: White-tab sockets first, then black; identical layout on both CPUs; 6 DIMMs per CPU for best performance

Storage

Front bays: 8 x 3.5" hot-swap bays (take 3.5" or 2.5" SAS/SATA drives)
Optical: Slimline bay: DVD-ROM or DVD+/-RW
Drives offered: 2.5" SATA SSD up to 1 TB (960 GB), SAS SSD 400/800 GB, SATA 7.2K up to 2 TB, SAS 10K 1.8 TB, SAS 15K 600 GB; 3.5" SATA 7.2K 1, 2, 8 TB
Total: Spec sheet: up to 80 TB total storage
Onboard SATA: 2 x Intel chipset AHCI 6 Gb/s SATA controllers, 4 ports each (8 total) + 1 optical port; Intel RSTe RAID 0/1/5/10 on the first controller's 4 ports only
RAID cards: PERC H330 (JBOD, RAID 0/1/5/10), PERC H730P (1 GB cache), PERC H740P (4 GB cache); PERC needed for SAS drives; PERCs go in slot 3; mini PERC connector on riser 1
M.2 NVMe: Up to 8 x M.2 NVMe on two Dell Ultra-Speed Drive Quad x16 cards (needs dual CPUs, slots 4 and 8), or Ultra-Speed Drive Duo x8 (HH/HL, slot 6 low-profile or full-height slots)
NVMe RAID: Intel RSTe (vROC) RAID 0/1/10 on the first Quad or Duo card, with the motherboard activation key

Graphics

Capacity: Up to 3 x 300 W double-width x16 cards (slots 1, 4, 8; dual CPU) or up to 6 full-height single-width; 900 W graphics total
High end: NVIDIA Quadro RTX 8000, RTX 6000, RTX 5000, GV100, P6000, P5000; AMD Radeon Pro W5700, WX 9100, Radeon Pro SSG
Mid-range: NVIDIA Quadro RTX 4000, P4000, P2200, P2000; AMD Radeon Pro W5500, WX 7100, WX 5100, WX 4100
Entry: NVIDIA Quadro P620, P400
Integrated: Matrox G200eW3 (iDRAC), 16 MB, VGA up to 1920 x 1200 at 60 Hz; spec sheet: needs an iDRAC9 Enterprise licence to enable
Aux power: Each of the 3 risers ships with 1 x 6+2-pin and 1 x 6-pin graphics power connector
Rules: Multiple GPUs must be the same model; SLI pairs go in slots 4 and 7 (needs CPU2 and an SLI cable)

Expansion

Slot 1 (riser 1C): PCIe Gen 3 x16, full height, full length (CPU1)
Slot 2 (riser 1C): PCIe Gen 3 x8 in x16 connector, full height, full length (CPU1)
Slot 3 (riser 1C): PCIe Gen 3 x8 in x16 connector, full height, half length (CPU1); PERC slot; no Teradici cards
Slot 4 (riser 2A): PCIe Gen 3 x16, full height, full length (CPU2)
Slot 5 (riser 2A): PCIe Gen 3 x8 in x16 connector, full height, full length (CPU2)
Slot 6 (riser 2A): PCIe Gen 3 x8 in x16 connector, low profile, half length (CPU1); only slot for LP cards
Slot 7 (riser 3A): PCIe Gen 3 x8 in x16 connector, full height, full length (CPU2)
Slot 8 (riser 3A): PCIe Gen 3 x16, full height, full length (CPU2)
Single CPU: Slots 1, 2, 3 and 6 work; slots 4, 5, 7, 8 need the second CPU
NDC: Dedicated network daughter card slot
Other cards: Teradici dual/quad-display PCoIP host cards, USB 3.1 Gen 2 Type-C card (later removed from the guidebook), serial port card

Networking

NDC (base): Intel i350 quad-port 1 GbE (4 x RJ45)
NDC (optional): Intel X550 dual 10GbE + i350 dual 1GbE; Intel X710 dual 10GbE DA/SFP+ + i350 dual 1GbE
Management: Broadcom BCM54210 1 GbE dedicated to iDRAC9 (RJ45)

Power

PSU options: 1100 W AC or 1600 W AC, one or two hot-plug units; 100-240 V autoranging
Efficiency: Owner's manual: Platinum class; spec sheet: 1100 W 90% efficient (80 PLUS Gold); PSU label: EPP 1100 W, 94.5% efficiency
Input current: 1100 W: 12-6.5 A; 1600 W: 10 A
Heat: 1100 W: 4100 BTU/hr max; 1600 W: 6000 BTU/hr max
Low line: 1600 W PSU derates to 800 W at 100-120 V
Redundancy: 1+1 redundant or 2+0 non-redundant, set in BIOS; hot-spare mode sleeps one PSU at low load
High-power GPUs: Some CPU + GPU configs need 2 x 1100 W non-redundant or 2 x 1600 W at 220 V non-redundant (Dell guidebook power table)

Ports

Front: 2 x USB 2.0, 1 x USB 3.0, micro-USB iDRAC Direct, VGA, power button
Rear: 2 x USB 3.0, 4 x RJ45 (NDC), 1 x RJ45 iDRAC9, VGA, serial (DB9, 16550), system ID button and connector
Internal: 1 x USB 3.0 (for a USB key), vFlash SD connector

Physical

Form factor: 2U rack
Dimensions: 86.8 x 482 x 715.5 mm (H x W x D); 751.3 mm deep with bezel; 434 mm wide without rack ears
Weight: 28.6 kg maximum with all 3.5" drives
Rails: B6 ReadyRails II sliding (4-post square, round or threaded; optional cable arm) or B4 static rails (also 2-post)
Operating temp: 10-35 C continuous (below 950 m); derates above 950 m
Altitude: Operating to 3048 m

Management

BMC: iDRAC9 Express or Enterprise with Lifecycle Controller (Redfish, RACADM, WS-Man), Quick Sync 2 (BLE/Wi-Fi) optional
Front panel: Optional LCD bezel with iDRAC IP / status display; system health and ID indicators
vFlash: Owner's manual: optional internal 16 GB vFlash card; guidebook: vFlash not offered
Security: TPM 1.2 or TPM 2.0 (Nuvoton, or NationZ 2.0), chassis intrusion switch, lockable bezel, setup/BIOS password

Operating systems

Windows: Windows 11 Pro / Pro for Workstations; Windows 10 Pro / Pro for Workstations; Windows 7 Pro 64-bit downgrade (not with Cascade Lake CPUs)
Linux: Red Hat Enterprise Linux 7.5 and 8.0 (8.0 required for Cascade Lake); Ubuntu 16.04, 18.04

Processors

Intel Xeon Gold 6258R
Intel Xeon Gold 6248R
Intel Xeon Gold 6246R
Intel Xeon Gold 6242R
Intel Xeon Gold 6240R
Intel Xeon Gold 6238R
Intel Xeon Gold 6230R
Intel Xeon Gold 6226R
Intel Xeon Gold 5220R
Intel Xeon Gold 5218R
Intel Xeon Silver 4215R
Intel Xeon Silver 4214R
Intel Xeon Silver 4210R
Intel Xeon Bronze 3206R
Intel Xeon Platinum 8280
Intel Xeon Platinum 8280M
Intel Xeon Platinum 8280L
Intel Xeon Platinum 8276
Intel Xeon Platinum 8276M
Intel Xeon Platinum 8276L
Intel Xeon Platinum 8270
Intel Xeon Platinum 8268
Intel Xeon Platinum 8260
Intel Xeon Platinum 8260M
Intel Xeon Platinum 8260L
Intel Xeon Platinum 8256
Intel Xeon Platinum 8253
Intel Xeon Gold 6254
Intel Xeon Gold 6252
Intel Xeon Gold 6248
Intel Xeon Gold 6244
Intel Xeon Gold 6242
Intel Xeon Gold 6240
Intel Xeon Gold 6240M
Intel Xeon Gold 6238
Intel Xeon Gold 6238M
Intel Xeon Gold 6234
Intel Xeon Gold 6230
Intel Xeon Gold 6226
Intel Xeon Gold 5222
Intel Xeon Gold 5220
Intel Xeon Gold 5218
Intel Xeon Gold 5217
Intel Xeon Gold 5215
Intel Xeon Gold 5215M
Intel Xeon Gold 5215L
Intel Xeon Silver 4216
Intel Xeon Silver 4215
Intel Xeon Silver 4214
Intel Xeon Silver 4210
Intel Xeon Silver 4208
Intel Xeon Bronze 3204
Intel Xeon Platinum 8180
Intel Xeon Platinum 8180M
Intel Xeon Platinum 8176
Intel Xeon Platinum 8170
Intel Xeon Platinum 8168
Intel Xeon Platinum 8164
Intel Xeon Platinum 8160
Intel Xeon Platinum 8160M
Intel Xeon Platinum 8156
Intel Xeon Gold 6154
Intel Xeon Gold 6152
Intel Xeon Gold 6150
Intel Xeon Gold 6148
Intel Xeon Gold 6146
Intel Xeon Gold 6144
Intel Xeon Gold 6142
Intel Xeon Gold 6140
Intel Xeon Gold 6140M
Intel Xeon Gold 6138
Intel Xeon Gold 6136
Intel Xeon Gold 6134
Intel Xeon Gold 6134M
Intel Xeon Gold 6132
Intel Xeon Gold 6130
Intel Xeon Gold 6128
Intel Xeon Gold 6126
Intel Xeon Gold 5122
Intel Xeon Gold 5120
Intel Xeon Gold 5118
Intel Xeon Gold 5115
Intel Xeon Silver 4116
Intel Xeon Silver 4114
Intel Xeon Silver 4112
Intel Xeon Silver 4110
Intel Xeon Silver 4108
Intel Xeon Bronze 3106
Intel Xeon Bronze 3104