Dell PowerEdge R940

Dell's 14th-generation four-socket 3U rack server for mission-critical workloads (ERP, large databases, HPC). Ships as an 8-drive, two-socket base chassis or, with the Processor Expansion Module (PEM), a 24-drive, four-socket configuration with up to 13 PCIe Gen 3 slots and 6 TB of memory.

Memory

Slots: 48 DDR4 DIMM (12 per CPU, 6 channels x 2 DIMMs); 24 sockets on the PEM riser for 4-socket use only
RDIMM: 8 GB (1R), 16/32/64 GB (2R); up to 384 GB/socket (2-socket) or 768 GB/socket (4-socket) max per the memory table
LRDIMM: 64 GB (4R) and 128 GB (8R); up to 3 TB (2-socket, 24 DIMMs) or 6 TB (4-socket, 48 DIMMs)
NVDIMM-N: 16 GB (1R), up to 12, system-board sockets only (not supported on the PEM riser); max 192-384 GB
Optane PMem (DCPMM): 128/256/512 GB modules, up to 6 per CPU (24 total on 4 sockets); up to 12.28 TB PMem alone or 15.36 TB combined with LRDIMM; 2400 W PSU required
Modes: Memory Mode (DRAM as cache, not addressable) or App Direct Mode (PMem persistent, app must support it)

Storage

Front bays: 8 x 2.5" SAS/SATA (base, passive backplane) or up to 24 x 2.5" SAS/SATA/NVMe hot-plug (active backplane, with PEM); up to 184.32 TB max (24 x 7.68 TB SAS/SATA/SSD/NVMe)
NVMe: Up to 12 x 2.5" PCIe NVMe SSD-capable universal slots (e.g. 20 SAS + 4 NVMe, or 16 SAS + 8 NVMe)
Internal RAID/HBA: PERC S140 (software RAID, NVMe/M.2 SATA), H330, H740P; full-height PERC only, in slot 1 (primary) or slot 6 (secondary) - no mini-PERC
External: PERC H840 (RAID); 12 Gb/s SAS HBA (non-RAID)
Boot: BOSS: M.2 SATA SSD(s) as non-RAID disks or a single RAID 1 volume, not hot-plug; IDSDM (2 x microSD, 16/32/64 GB) and/or vFlash (1 x microSD, 16 GB), combined card, not hot-plug
External devices: USB tape, NAS/IDM appliance software, 12 Gb MD-series JBODs; external LTO-5/6/7 SAS or FC tape via 114X/TL1000/TL2000/TL4000/ML6000

Graphics

Onboard: Matrox G200eW3, 16 MB frame buffer, up to 1920 x 1200 / 1920 x 1080

Expansion

Board slots 1-7: Slot 1 (CPU1): x8 electrical, x16 connector, FH/HL. Slots 2-3 (CPU1) and 4, 7 (CPU2): x16, FH/HL. Slots 5-6 (CPU2): x8 electrical, x16 connector, FH/HL
Riser 2 (PEM, 4-socket only): Slot 8 (CPU3): x16, FH, 3/4 length. Slots 9-10 (CPU3): x16, FH/HL
Riser 3 (PEM, 4-socket only): Slot 11 (CPU4): x16, FH, 3/4 length. Slots 12-13 (CPU4): x16, FH/HL
Total: Up to 7 slots (2-socket, no PEM) or 13 slots (4-socket, with PEM), all PCIe Gen 3; 3 electrical x8 and 10 electrical x16

Networking

rNDC: 4 x 1GbE RJ-45; 4 x 10GbE RJ-45; 2 x 10GbE + 2 x 1GbE RJ-45; 2 x 1GbE + 2 x 10GbE SFP+; 4 x 10GbE SFP+; or 2 x 25GbE SFP28 - PCIe Gen 3 x8, not hot-pluggable
Management: 1 x dedicated 1GbE iDRAC9 Enterprise port

Power

1100 W AC: Platinum; 100-120 V derated to 1050 W, 200-240 V full 1100 W
1100 W DC: -48 to -60 VDC, 1100 W
1100 W Mixed-Mode HVDC: China/Japan; 100-120 V AC derated to 1050 W or 200-380 V DC at 1100 W
1600 W AC: Platinum; 100-120 V derated to 800 W, 200-240 V full 1600 W
2000 W AC: Platinum; 100-120 V derated to 1000 W, 200-240 V full 2000 W
2400 W AC: Platinum; 100-120 V derated to 1400 W, 200-240 V full 2400 W; required for Optane PMem
Redundancy: Up to 2 hot-plug PSUs, 1+1 redundant, auto-sensing/auto-switching; up to 8 hot-plug fans, N+1

Ports

Front: 1 x VGA (15-pin), 2 x USB 3.0, 1 x iDRAC Direct (micro-USB 2.0)
Rear: 1 x VGA (15-pin), 1 x serial (9-pin DTE, 16550-compliant), 2 x USB 3.0, 1 x dedicated iDRAC9 Enterprise network port, NIC ports per rNDC
Internal: 1 x USB 3.0

Physical

Form factor: 3U rack
Dimensions: 130.3 mm H x 482.0 mm W (with ears, 434.0 mm chassis) x 777.05 mm D (with bezel) / 726.2 mm D (without bezel)
Weight: 49.9 kg (110 lb) maximum, all drives/SSDs installed
Operating temp: 10-35 degC continuous (below 950 m); extended 5-40 degC (<=10% of hours) or -5 to 45 degC (<=1% of hours)
Battery: CR2032 3.0 V lithium coin cell

Management

BMC: iDRAC9 (Express or Enterprise) with Lifecycle Controller 3.x, IPMI 2.0 compliant; optional Quick Sync 2 wireless module; optional LCD bezel
Software: OpenManage Enterprise, OpenManage Essentials, OpenManage Mobile, OpenManage Power Center; digital license key; Easy Restore
Integrations: Microsoft System Center, VMware vCenter, BMC TrueSight, Red Hat Ansible; connections for Nagios Core/XI, Micro Focus OMi, IBM Tivoli Netcool/OMNIbus
Security: TPM 1.2/2.0 (optional), cryptographically signed firmware, Secure Boot, System (Server) Lockdown, System Erase, tooled cover latch

Operating systems

Supported: Canonical Ubuntu Server LTS, Citrix XenServer/Hypervisor, Microsoft Windows Server with Hyper-V, Oracle Linux, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware ESXi

Processors

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 Platinum 8180
Intel Xeon Platinum 8180M
Intel Xeon Platinum 8176
Intel Xeon Platinum 8176M
Intel Xeon Platinum 8170
Intel Xeon Platinum 8170M
Intel Xeon Platinum 8168
Intel Xeon Platinum 8164
Intel Xeon Platinum 8160
Intel Xeon Platinum 8160M
Intel Xeon Platinum 8158
Intel Xeon Platinum 8156
Intel Xeon Platinum 8153
Intel Xeon Gold 6254
Intel Xeon Gold 6252
Intel Xeon Gold 6248
Intel Xeon Gold 6246
Intel Xeon Gold 6244
Intel Xeon Gold 6242
Intel Xeon Gold 6240
Intel Xeon Gold 6240M
Intel Xeon Gold 6240L
Intel Xeon Gold 6238
Intel Xeon Gold 6238M
Intel Xeon Gold 6238L
Intel Xeon Gold 6234
Intel Xeon Gold 6230
Intel Xeon Gold 6226
Intel Xeon Gold 6154
Intel Xeon Gold 6152
Intel Xeon Gold 6150
Intel Xeon Gold 6148
Intel Xeon Gold 6142
Intel Xeon Gold 6142M
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 6262V
Intel Xeon Gold 6222V
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 Gold 5122
Intel Xeon Gold 5120
Intel Xeon Gold 5118
Intel Xeon Gold 5115