The Dell PowerEdge R6625 is a 1U dual-socket rack server engineered as a foundation for modern data centers, delivering strong compute performance alongside flexible, low-latency storage — packed into a dense footprint with air-cooled or Direct Liquid Cooling (DLC) options.
Drive Bay Options
Configuration-wise, the R6625 packs 2 processors and 24 DIMMs of DDR5 memory, with room for up to 3 PCIe slots plus dedicated LOM and OCP slots. Cooling flexes between air and Direct Liquid Cooling depending on build and CPU TDP, and this Gen16 Dell rack server can accommodate up to 3 single-width 75W GPUs.
Chassis OptionsFront bays:
- Up to 4 x 3.5-inch SAS/SATA (HDD/SSD) max 80 TB
- Up to 8 x 2.5-inch NVMe max 122.88 TB
- Up to 10 x 2.5-inch SAS/SATA/NVMe (HDD/SSD) max 153.6 TB (Universal)
- Up to 14 x E3.S (NVMe Gen5 ) max 89.6 TB
- Up to 16 x E3.S (NVMe Gen5 ) max 102.4 TB
Rear bays:Only the 4 LFF and the 10 Universal Chassis support rear drive cages.
- Up to 2 x 2.5-inch SAS/SATA (HDD/SSD) max 30.72 TB
- Up to 2 x E3.s (NVMe Gen5) max 12.8 TB
Processors and Heatsinks
Processor Two 4th Generation AMD EPYC 9004 series processors, offering up to 128 cores, power this configuration. Any CPU exceeding 240W requires DIMM blanks in all unpopulated DIMM slots.
Heatsink & FansCooling capacity comes from up to four sets of dual-fan modules, offered in Standard or High-Performance Gold hot-plug variants. When an OCP card is present in a no-riser configuration (RC0), an OCP shroud is required, and air-cooled builds with a 2x 2.5" rear-drive configuration need a Rear Drive Shroud installed as well.
Memory
Memory tops out at 24 RDIMMs, supporting up to 6TB total capacity and speeds up to 4800 MT/s. Note that 256GB RDIMMs aren't compatible with the 4x 3.5" chassis configuration, and mixing DIMM types isn't supported.
| DIMM type |
Rank |
Capacity |
Operating Speed |
| 1 DIMM per channel (DPC) |
|---|
| DDR5 RDIMM |
1 R |
16 GB |
4800 MT/s |
| 2 R |
32 GB, 64 GB |
4800 MT/s |
| 4 R |
128 GB |
4800 MT/s |
| 8 R |
256 GB |
4800 MT/s |
Expansion Slots
Three PCIe 4.0/5.0 expansion slots support up to 2x 75W single-wide GPUs, per the configurations outlined below. Keep in mind that installing rear drive cages will occupy most of these PCIe slots.
| Config # |
RSR Configuration |
# of CPUs /
# of PCIe Slots |
PERC type supported |
Rear Storage Possible |
| 0 |
NO RSR |
2 / 0 |
Front PERC |
No |
| 1 |
R2A + R3A |
2 / 3 |
Front PERC |
No |
| 2 |
R2P + R3P |
2 / 3 |
Front PERC |
No |
| 3 |
R1P + R4P |
2 / 2 |
Front PERC |
No |
| 4 |
R2Q |
2 / 2 |
Front PERC |
No |
| 5 |
R3P |
2 / 1 |
Front PERC |
Yes |
| 6 |
R2S+R3S |
2 / 2 |
Front PERC |
Yes |
| 7 |
R2A |
1 / 1 |
Front PERC |
No |
| 8 |
R2A+ R4-E3 Paddle card |
2 / 2 |
Front PERC |
No |
Networking Adapters (LOM + OCP 3.0)
The Dell PowerEdge R6625 offers three paths for network expansion: PCIe slots, the onboard LOM, or the OCP 3.0 slot.
With only 3 PCIe slots available, the R6625 fills up quickly — which is why two additional network adapter options exist. The LOM slot supports up to 2 ports at 1Gb speeds (LOM board, 2x 1Gb with BCM5720 LAN controller), while the OCP slot handles up to 4 ports reaching speeds of 25Gb/s.
NOTE: Both the LOM card and OCP can be installed at the same time.
| Feature |
OCP 3.0 |
| Form factor |
SFF |
| PCIe Gen |
Gen4 |
| Max PCIe width |
x8 |
| Max no.of ports |
2 |
| Port type |
BT/SFP+/SFP28 |
| Max port speed |
25 GbE |
| NC-SI |
Yes |
| WoL |
Yes |
| Power consumption |
35 W |
Storage Controllers
New to 16GThe Harpoon-based Premium Performance tier is a new addition to 16G, engineered to boost IOPS and enhance SSD performance at the high end..
fPERC SolutionThe fPERC solution rounds out Dell's RAID controller lineup, providing a base RAID hardware controller that skips PCIe slot consumption via a compact, high-density connector to the base planar.
8 SFF NVMe ChassisOpting for the 8 SFF NVMe chassis with RAID means installing the H755N storage controller, which is built to support NVMe drives.
BOSS-N1The BOSS-N1 hot-swap boot device includes 2x M.2 480GB NVMe SSD drives and occupies a dedicated motherboard slot to manage OS booting. If it's not installed, that slot must be filled with a BOSS blank instead.
| Performance Level |
Controller and Description |
| Entry |
S160 (SATA, NVMe), SW RAID SATA, NVMe |
| Value |
H355, HBA355 (internal/External), HBA465 (external) |
| Premium Performance |
H755, H755N, H965 (internal/external) |
Power & Dimensions
Power
| PSU |
Class |
| 800 W Mixed Mode |
Platinum |
| 1100 W Mixed Mode |
Titanium 100-240 V AC |
| 1100 W DC |
N/A -48-(-60V) DC |
| 1400 W Mixed Mode |
Platinum |
| 1400 W Mixed Mode |
Titanium |
| 1800 W Mixed Mode |
Titanium |
Dimensions:
-
Width: 42.8mm (1.685")
-
Height: 482.0mm (18.97")
-
Length w/ Bezel: 822.89mm (32.4")
-
Length w/o Bezel: 809.05mm (31.85")
WeightWith drives 20.4 kg (44.97lbs)
Without drives and PSU installed 15.8 kg (34.83lbs)
