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Head-to-head · every figure from the vendor documents

Dell R6625 vs Dell R6725

A specification-by-specification comparison of the Dell PowerEdge R6625 and the Dell PowerEdge R6725, built from Dell’s own documents. None of the headline measures favour the R6625; 4 favour the R6725, and they share no processors.

Bottom line. R6725 leads on virtualisation, storage density, AI and acceleration, network throughput. Neither vendor publishes benchmarks for these machines, so every call here is made on what their documents state.

Dell PowerEdge R6625 front view with ten 2.5-inch drive bays, the left control panel and VGA, USB and power button on the right
Dell PowerEdge
R6625
1U Rack2 sockets24 DIMMiDRAC9
Configure the R6625 →Full data sheet
VS
Dell PowerEdge R6725 front with ten 2.5-inch drive bays in two rows, left USB and Mini DisplayPort panel, right power and USB-C panel
Dell PowerEdge
R6725
1U Rack2 sockets24 DIMMiDRAC10
Configure the R6725 →Full data sheet
01 — Scoreboard

The measures that decide it

Each row is a figure both vendors publish. Bars show the split between the two; a badge marks the larger figure, which is not always the better buy — a shallower chassis or a lower power ceiling can matter more.

2
Processor sockets
2
256
Cores, fully populated
Largest listed processor × its socket count
Higher384
6 TB
Memory ceiling
As each document states it
6 TB
16
Drive bays
Higher22
Up to 2
Accelerators
HigherUp to 3
1,800 W
Largest power supply
1,800 W
1U Rack
Rack height
1U Rack
100 GbE class
Fastest network option
Higher200 GbE class
02 — Verdict

Which one, and why

Drawn from the measures above and each model’s own data sheet. Neither vendor publishes benchmark results for these servers, so nothing here claims one is “faster”.

Choose the R6625 if…

  • Two sockets in one rack unit: a pair of 128-core 9754s gives 256 cores, and Dell rates them for air at 30°C with the 8 × 2.5-inch NVMe front or no backplane.

Choose the R6725 if…

  • Cores, fully populated: 384 against 256 on the R6625
  • Drive bays: 22 against 16 on the R6625
  • Accelerators: Up to 3 against Up to 2 on the R6625
  • Two EPYC 9005 sockets in 1U, each up to 192 cores with the EPYC 9965 — 384 cores in a single rack unit.
03 — By workload

Where each one pulls ahead

Calls made on documented capacity only — cores, memory, bays, accelerators and network options — with the figures behind each one shown.

VirtualisationR6625: 256 cores with 6 TB. R6725: 384 cores with 6 TB.R6725
Databases & in-memoryMemory ceiling 6 TB against 6 TB, across 24 and 24 DIMM slots.Line ball
Storage density16 bays in 1U against 22 in 1U.R6725
AI & acceleration2 accelerators against 3 in the vendor documents.R6725
Network throughputFastest card listed: 100 GbE class against 200 GbE class.R6725
04 — Specifications

Side by side, differences first

Everything both documents state, grouped. The default view hides rows where the two machines are identical.

Processors

Every processor each vendor lists for the model, from its own document.

SpecificationR6625R6725
Processors listed1920
Most cores per processor128192
Highest processor TDP360 W500 W
Processor familiesAMD EPYC 9004AMD EPYC 9005
Single-processor optionYesNo

Memory

SpecificationR6625R6725
Memory typesRDIMM DDR5-4800 · RDIMM DDR5-5600 · RDIMM DDR5-6400 · 3DS RDIMM DDR5RDIMM DDR5-6400

Storage

Bay counts are the maximum each document states, including rear and mid-chassis positions.

SpecificationR6625R6725
Maximum bays1622
Documented layouts148
Boot devicesBOSS-N1 · IDSDMBOSS-N1 DC-MHS (RAID 0/1, 2 x M.2 NVMe 480 GB or 960 GB read-intensive)
Storage controllers105

Accelerators & I/O

SpecificationR6625R6725
Accelerators supportedUp to 2Up to 3
OCP slots12
Network cards listed1715

Power & platform

SpecificationR6625R6725
Power-supply options78
Input typesAC · −48 V DC · 277 VAC / HVDCAC · 277 VAC / HVDC
ManagementiDRAC9iDRAC10
Chassis depthVendors measure depth differently — see each data sheet822.89 mm with bezel / 809.05 mm without bezel815.14 mm without bezel / 816.92 mm with bezel
05 — The data

Processors, memory, bays and power

The same charts each data sheet carries, drawn to the same scale so the two ranges can be read against each other.

R6625: processors by cores and TDP

Dell PowerEdge R6625 processors081624324048566472808896104112120128200 W250 W300 W350 W400 WCores per processorAMD EPYC 9754 — 128 cores / 256 threads · 360 W · 2.25 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9734 — 112 cores / 224 threads · 340 W · 2.2 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9654 — 96 cores / 192 threads · 360 W · 2.4 GHz base · 384 MB cache · DDR5-4800AMD EPYC 9684X — 96 cores / 192 threads · 320 W · 2.55 GHz base · 1152 MB cache · DDR5-4800AMD EPYC 9634 — 84 cores / 168 threads · 290 W · 2.25 GHz base · 384 MB cache · DDR5-4800AMD EPYC 9554 — 64 cores / 128 threads · 360 W · 3.1 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9534 — 64 cores / 128 threads · 280 W · 2.45 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9474F — 48 cores / 96 threads · 360 W · 3.6 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9454 — 48 cores / 96 threads · 290 W · 2.75 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9384X — 32 cores / 64 threads · 320 W · 3.1 GHz base · 768 MB cache · DDR5-4800AMD EPYC 9374F — 32 cores / 64 threads · 320 W · 3.85 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9354 — 32 cores / 64 threads · 280 W · 3.25 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9334 — 32 cores / 64 threads · 210 W · 2.7 GHz base · 128 MB cache · DDR5-4800AMD EPYC 9274F — 24 cores / 48 threads · 320 W · 4.05 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9254 — 24 cores / 48 threads · 200 W · 2.9 GHz base · 128 MB cache · DDR5-4800AMD EPYC 9224 — 24 cores / 48 threads · 200 W · 2.5 GHz base · 384 MB cache · DDR5-4800AMD EPYC 9184X — 16 cores / 32 threads · 320 W · 3.55 GHz base · 768 MB cache · DDR5-4800AMD EPYC 9174F — 16 cores / 32 threads · 320 W · 4.1 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9124 — 16 cores / 32 threads · 200 W · 3 GHz base · 64 MB cache · DDR5-4800EPYC 9754128 cores · 2.8 W/core — top SKU and most efficient
AMD EPYC 9004 19Bubble size = L3 cache · hover a bubble for the full SKU

R6725: processors by cores and TDP

Dell PowerEdge R6725 processors081624324048566472808896104112120128136144152160168176184192100 W150 W200 W250 W300 W350 W400 W450 W500 WCores per processorAMD EPYC 9965 — 192 cores / 384 threads · 500 W · 2.25 GHz base · 384 MB cache · DDR5-6400AMD EPYC 9845 — 160 cores / 320 threads · 390 W · 2.1 GHz base · 320 MB cache · DDR5-6400AMD EPYC 9825 — 144 cores / 288 threads · 390 W · 2.2 GHz base · 384 MB cache · DDR5-6400AMD EPYC 9755 — 128 cores / 256 threads · 500 W · 2.7 GHz base · 512 MB cache · DDR5-6400AMD EPYC 9745 — 128 cores / 256 threads · 400 W · 2.4 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9655 — 96 cores / 192 threads · 400 W · 2.6 GHz base · 384 MB cache · DDR5-6400AMD EPYC 9575F — 64 cores / 128 threads · 400 W · 3.3 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9555 — 64 cores / 128 threads · 360 W · 3.2 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9535 — 64 cores / 128 threads · 300 W · 2.4 GHz base · 256 MB cache · DDR5-6000AMD EPYC 9475F — 48 cores / 96 threads · 400 W · 3.65 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9455 — 48 cores / 96 threads · 300 W · 3.15 GHz base · 256 MB cache · DDR5-6000AMD EPYC 9375F — 32 cores / 64 threads · 320 W · 3.8 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9355 — 32 cores / 64 threads · 280 W · 3.55 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9335 — 32 cores / 64 threads · 210 W · 3 GHz base · 128 MB cache · DDR5-6400AMD EPYC 9275F — 24 cores / 48 threads · 320 W · 4.1 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9255 — 24 cores / 48 threads · 200 W · 3.2 GHz base · 128 MB cache · DDR5-6400AMD EPYC 9175F — 16 cores / 32 threads · 320 W · 4.2 GHz base · 512 MB cache · DDR5-6400AMD EPYC 9135 — 16 cores / 32 threads · 200 W · 3.65 GHz base · 64 MB cache · DDR5-6400AMD EPYC 9115 — 16 cores / 32 threads · 125 W · 2.6 GHz base · 64 MB cache · DDR5-6400AMD EPYC 9015 — 8 cores / 16 threads · 125 W · 3.6 GHz base · 64 MB cache · DDR5-6400EPYC 9965192 cores — the top SKUEPYC 98452.4 W/core — most efficient
AMD EPYC 9005 20Bubble size = L3 cache · hover a bubble for the full SKU

R6625: memory with every slot filled

16 GB384 GB32 GB768 GB64 GB1.5 TB96 GB2.3 TB128 GB3 TB256 GB6 TB24 slots · 12 per processor · each tick = one DIMM

R6725: memory with every slot filled

16 GB384 GB32 GB768 GB64 GB1.5 TB96 GB2.3 TB128 GB3 TB256 GB6 TB24 slots · 12 per processor · each tick = one DIMM

R6625: drive bays

Front panel

16 × EDSFF NVMe at the front — 16 bays in total.

SAS/SATANVMeSAS/SATA + NVMe

R6725: drive bays

Front panel

20 × EDSFF NVMe at the front — 20 bays in total.

SAS/SATANVMeSAS/SATA + NVMe

R6625: power supplies

0500100015002000800 W Platinum — Mixed mode (100-240 V AC / 240 V HVDC); 60 mm800Platinum1100 W N/A (-48 V DC) — LVDC -48 to -60 V DC input; 60 mm1100DC1100 W Titanium — Mixed mode (100-240 V AC / 240 V HVDC); 1050 W at low line; 60 mm10501100Titanium1400 W Platinum — Mixed mode (100-240 V AC / 240 V HVDC); 1050 W at low line; 60 mm10501400Platinum1400 W Titanium — Mixed mode (100-240 V AC / 240 V HVDC); 1050 W at low line; 60 mm10501400Titanium1400 W Titanium — Mixed mode 277 V AC or 336 V HVDC (Table 2 only; not in Tables 33/34)1400Titanium1800 W Titanium — Mixed mode (Table 2: 100-240 V AC / 240 V HVDC; spec sheet: 200-240 V AC); no low-line rating (highline only per Table 33); 60 mm1800TitaniumWatts · dashed line = output at 100–120 V low line
AC277 VAC / HVDC−48 V DC

R6725: power supplies

0500100015002000800 W Platinum — 100-240 VAC or 240 VDC; 60 mm; C13800Platinum800 W Titanium — 100-240 VAC or 240 VDC; 60 mm; C13800Titanium1100 W Platinum — 100-240 VAC or 240 VDC; 60 mm; C131100Platinum1100 W Titanium — 100-240 VAC or 240 VDC; 60 mm; C131100Titanium1400 W N/A (DC) — -48 to -60 VDC Telco; DC power cable1400DC1500 W Titanium — 100-240 VAC (derated to 1050 W at 100-120 VAC) or 240 VDC; 60 mm; C131500Titanium1500 W Titanium — 277 VAC or 336 VDC HVDC; 60 mm; APP/Saf-D-Grid1500Titanium1800 W Titanium — 200-240 VAC or 240 VDC; 60 mm; C13; not available at November 2025 launch1800TitaniumWatts · dashed line = output at 100–120 V low line
AC277 VAC / HVDC
07 — Questions

R6625 vs R6725, answered

Is the R6625 or the R6725 the faster server?

Neither document publishes benchmark results, so this page compares what they do state. The R6625 lists 19 processors up to 128 cores at 360 W; the R6725 lists 20 up to 192 cores at 500 W. Fully populated that is 256 cores against 384.

Which holds more memory?

The R6625 has 24 DIMM slots and a stated ceiling of 6 TB. The R6725 has 24 and 6 TB.

Which takes more drives?

R6625: 16 bays across 14 documented layouts. R6725: 22 across 8. Counts include rear and mid-chassis positions where the vendor documents them.

Can either take GPUs?

R6625: up to 2 accelerators, 0 double-wide cards listed. R6725: up to 3, 0 double-wide listed.

Do they share any processors?

No. The two documents list different processors, so a like-for-like processor build is not possible across these two.

Where these figures come from. R6625: Dell PowerEdge R6625 Technical Guide (July 2026, Rev. A07) (Dell document). R6725: Dell PowerEdge R6725 Technical Guide (May 2026) (Dell document). Each claim on this page is derived from those documents, checked page by page on the two data sheets, and carries no pricing.

Other comparisons in this class

R6625 vs DL365 Gen11Dell vs HPER6625 vs DL360 Gen12Dell vs HPER6625 vs SR645 V3Dell vs LenovoR6625 vs SR630 V4Dell vs LenovoR6725 vs DL365 Gen11Dell vs HPER6725 vs DL360 Gen11Dell vs HPER6725 vs SR645 V3Dell vs LenovoR6725 vs SR630 V4Dell vs Lenovo

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