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

Dell R6615 vs Lenovo SR635 V3

A specification-by-specification comparison of the Dell PowerEdge R6615 and the Lenovo ThinkSystem SR635 V3, built from Dell’s and Lenovo’s own documents. None of the headline measures favour the R6615; 3 favour the SR635 V3, and 20 processors appear in both lists.

Bottom line. SR635 V3 leads on virtualisation, 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 R6615 front with ten 2.5-inch drive bays, the left control panel and VGA plus USB ports on the right ear
Dell PowerEdge
R6615
1U Rack1 socket12 DIMMiDRAC9
Configure the R6615 →Full data sheet
VS
Lenovo ThinkSystem SR635 V3 1U front with ten 2.5-inch hot-swap drive bays, front USB and VGA ports and the operator panel
Lenovo ThinkSystem
SR635 V3
1U Rack1 socket12 DIMMXClarity Controller 2
Configure the SR635 V3 →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.

1
Processor sockets
1
128
Cores, fully populated
Largest listed processor × its socket count
Higher160
3 TB
Memory ceiling
As each document states it
3 TB
16
Drive bays
16
Up to 2
Accelerators
HigherUp to 5
1,800 W
Largest power supply
1,800 W
1U Rack
Rack height
1U Rack
100 GbE class
Fastest network option
Higher400 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 R6615 if…

  • One socket spans the whole EPYC 9004 range Dell lists here, from 16-core parts to the 128-core 9754, in a single rack unit.

Choose the SR635 V3 if…

  • Cores, fully populated: 160 against 128 on the R6615
  • Accelerators: Up to 5 against Up to 2 on the R6615
  • Fastest network option: 400 GbE class against 100 GbE class on the R6615
  • All twelve DDR5 channels belong to the one processor, so a single socket still reaches 3 TB with 256 GB 3DS RDIMMs, and 5th Gen EPYC can clock that memory at up to 6400 MHz.
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.

VirtualisationR6615: 128 cores with 3 TB. SR635 V3: 160 cores with 3 TB.SR635 V3
Databases & in-memoryMemory ceiling 3 TB against 3 TB, across 12 and 12 DIMM slots.Line ball
Storage density16 bays in 1U against 16 in 1U.Line ball
AI & acceleration2 accelerators against 5 in the vendor documents.SR635 V3
Network throughputFastest card listed: 100 GbE class against 400 GbE class.SR635 V3
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.

SpecificationR6615SR635 V3
Processors listed2345
Most cores per processor128160
Processor familiesAMD EPYC 9004AMD EPYC 9005 · AMD EPYC 9004

Memory

SpecificationR6615SR635 V3
Fastest rated speed—6,400 MT/s
Memory typesRDIMM DDR5-5600 · RDIMM DDR5-6400RDIMM DDR5-6400 (5th Gen EPYC) · RDIMM DDR5-4800 (4th Gen EPYC) · 9x4 RDIMM · 3DS RDIMM DDR5-6400

Storage

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

SpecificationR6615SR635 V3
Documented layouts1614
Bay sizes3.5-inch · 2.5-inch · E3.S2.5-inch · E3.S
Boot devicesBOSS-N1M.2 SATA/NVMe 2-Bay Enablement Kit (4Y37A09738) · M.2 SATA/x4 NVMe 2-Bay Adapter (4Y37A79663) · M.2 NVMe 2-Bay RAID Adapter (4Y37A09750) + 1 more
Storage controllers1017

Accelerators & I/O

SpecificationR6615SR635 V3
Accelerators supportedUp to 2Up to 5
PCIe network slots35
Network cards listed1630

Power & platform

SpecificationR6615SR635 V3
Output range700–1,800 W750–1,800 W
Input typesAC · −48 V DC · 277 VAC / HVDCAC · −48 V DC
ManagementiDRAC9XClarity Controller 2
Chassis depthVendors measure depth differently — see each data sheet772.13 mm with bezel / 758.29 mm without bezel (features table)—
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.

R6615: processors by cores and TDP

Dell PowerEdge R6615 processors081624324048566472808896104112120128200 W250 W300 W350 W400 WCores per processorAMD EPYC 9754 — 128 cores · 400 WAMD EPYC 9734 — 112 cores · 400 WAMD EPYC 9654 — 96 cores · 400 WAMD EPYC 9654P — 96 cores · 400 WAMD EPYC 9684X — 96 cores · 400 WAMD EPYC 9634 — 84 cores · 300 WAMD EPYC 9554 — 64 cores · 400 WAMD EPYC 9554P — 64 cores · 400 WAMD EPYC 9534 — 64 cores · 300 WAMD EPYC 9474F — 48 cores · 400 WAMD EPYC 9454 — 48 cores · 300 WAMD EPYC 9454P — 48 cores · 300 WAMD EPYC 9374F — 32 cores · 400 WAMD EPYC 9384X — 32 cores · 400 WAMD EPYC 9354 — 32 cores · 300 WAMD EPYC 9354P — 32 cores · 300 WAMD EPYC 9334 — 32 cores · 240 WAMD EPYC 9224 — 24 cores · 240 WAMD EPYC 9254 — 24 cores · 240 WAMD EPYC 9274F — 21 cores · 400 WAMD EPYC 9174F — 16 cores · 400 WAMD EPYC 9184X — 16 cores · 400 WAMD EPYC 9124 — 16 cores · 240 WEPYC 9754128 cores · 3.1 W/core — top SKU and most efficient
AMD EPYC 9004 23Bubble size = L3 cache · hover a bubble for the full SKU

SR635 V3: processors by cores and TDP

Lenovo ThinkSystem SR635 V3 processors081624324048566472808896104112120128136144152160100 W150 W200 W250 W300 W350 W400 WCores per processorAMD 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 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 9655P — 96 cores / 192 threads · 400 W · 2.6 GHz base · 384 MB cache · DDR5-6400AMD EPYC 9645 — 96 cores / 192 threads · 320 W · 2.3 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9565 — 72 cores / 144 threads · 400 W · 3.15 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 9555P — 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 · DDR5-6400AMD 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 · DDR5-6400AMD EPYC 9455P — 48 cores / 96 threads · 300 W · 3.15 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9365 — 36 cores / 72 threads · 300 W · 3.4 GHz base · 192 MB cache · DDR5-6400AMD 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 9355P — 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 · 3.25 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 · DDR5-6400AMD 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 9654P — 96 cores / 192 threads · 360 W · 2.4 GHz base · 384 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 9554P — 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 9454P — 48 cores / 96 threads · 290 W · 2.75 GHz base · 256 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 9354P — 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 9224 — 24 cores / 48 threads · 200 W · 2.5 GHz base · 64 MB cache · DDR5-4800AMD EPYC 9254 — 24 cores / 48 threads · 200 W · 2.9 GHz base · 128 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 9845160 cores · 2.4 W/core — top SKU and most efficient
AMD EPYC 9005 25AMD EPYC 9004 20Bubble size = L3 cache · hover a bubble for the full SKU

R6615: memory with every slot filled

16 GB192 GB32 GB384 GB64 GB768 GB96 GB1.1 TB128 GB1.5 TB256 GB3 TB12 slots · 12 per processor · each tick = one DIMM

SR635 V3: memory with every slot filled

16 GB192 GB32 GB384 GB64 GB768 GB96 GB1.1 TB128 GB1.5 TB256 GB3 TB12 slots · 12 per processor · each tick = one DIMM

R6615: drive bays

Front panel

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

SAS/SATANVMeSAS/SATA + NVMe

SR635 V3: drive bays

Front panel

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

SAS/SATANVMeSAS/SATA + NVMe

R6615: power supplies

0500100015002000700 W Titanium — Mixed mode HLAC (200-240 V AC / 240 V DC); no low-line operation; 60 mm; C13 cord700Titanium800 W Platinum — Mixed mode (100-240 V AC / 240 V DC); 800 W at low line; 60 mm; C13 cord800800Platinum1100 W N/A (-48 V DC) — -(48-60) V DC input (LVDC), 27 A; 60 mm1100DC1100 W Titanium — Mixed mode (100-240 V AC / 240 V DC); 1050 W at low line 100-120 V AC; 60 mm; C13 cord10501100Titanium1400 W Platinum — Mixed mode (100-240 V AC / 240 V DC); 1050 W at low line 100-120 V AC; 60 mm; C13 cord10501400Platinum1400 W Titanium — Mixed mode (100-240 V AC / 240 V DC); 1050 W at low line 100-120 V AC; 60 mm; C13 cord10501400Titanium1400 W Titanium — Mixed mode 277 V AC and HVDC (336 V DC); 60 mm; APP 2006G1 power cable1400Titanium1800 W Titanium — Mixed mode HLAC (200-240 V AC / 240 V DC); no low-line operation; 60 mm; C15 cord (Table 25 header misprints 'Platinum'; Tables 1, 2, 13, 26 say Titanium)1800TitaniumWatts · dashed line = output at 100–120 V low line
AC277 VAC / HVDC−48 V DC

SR635 V3: power supplies

0500100015002000750 W Platinum — AC input power - 80 PLUS Platinum efficiency; input 230V/115V; max quantity 2750Platinum750 W Titanium — AC input power - 80 PLUS Titanium efficiency; input 230V; max quantity 2750Titanium750 W Titanium — AC input power - 80 PLUS Titanium efficiency; input 230V; max quantity 2750Titanium1100 W n/a (DC input) — -48V DC input power; input -48V DC; max quantity 21100DC1100 W Platinum — AC input power - 80 PLUS Platinum efficiency; input 230V/115V; max quantity 21100Platinum1100 W Titanium — AC input power - 80 PLUS Titanium efficiency; input 230V; max quantity 21100Titanium1800 W Platinum — AC input power - 80 PLUS Platinum efficiency; input 230V; max quantity 21800Platinum1800 W Titanium — AC input power - 80 PLUS Titanium efficiency; input 230V; max quantity 21800TitaniumWatts · dashed line = output at 100–120 V low line
AC−48 V DC
06 — Like for like

20 processors you can order in either

Both vendor documents list these parts, so a build can be matched across the two and the comparison comes down to the chassis: 3 more are exclusive to the R6615 and 25 to the SR635 V3.

ProcessorCoresTDP
AMD EPYC 9754128400 W
AMD EPYC 9734112400 W
AMD EPYC 965496400 W
AMD EPYC 9654P96400 W
AMD EPYC 963484300 W
AMD EPYC 953464300 W
AMD EPYC 955464400 W
AMD EPYC 9554P64400 W
AMD EPYC 945448300 W
AMD EPYC 9454P48300 W
AMD EPYC 9474F48400 W
AMD EPYC 933432240 W
07 — Questions

R6615 vs SR635 V3, answered

Is the R6615 or the SR635 V3 the faster server?

Neither document publishes benchmark results, so this page compares what they do state. The R6615 lists 23 processors up to 128 cores at 400 W; the SR635 V3 lists 45 up to 160 cores at 400 W. Fully populated that is 128 cores against 160.

Which holds more memory?

The R6615 has 12 DIMM slots and a stated ceiling of 3 TB. The SR635 V3 has 12 and 3 TB.

Which takes more drives?

R6615: 16 bays across 16 documented layouts. SR635 V3: 16 across 14. Counts include rear and mid-chassis positions where the vendor documents them.

Can either take GPUs?

R6615: up to 2 accelerators, 0 double-wide cards listed. SR635 V3: up to 5, 0 double-wide listed.

Do they share any processors?

Yes — 20 processors appear in both documents, including the AMD EPYC 9754. That makes a like-for-like build possible on either server.

Where these figures come from. R6615: Dell PowerEdge R6615 Technical Guide (July 2026, Rev. A07) (Dell document). SR635 V3: Lenovo ThinkSystem SR635 V3 Server Product Guide (publication date is not printed in the text export; guide contains ‘New as of July 2026’ notes) (Lenovo 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

R470 vs SR635 V3Dell vs LenovoR6615 vs DL325 Gen11Dell vs HPER6615 vs DL320 Gen12Dell vs HPER6715 vs SR635 V3Dell vs LenovoR6615 vs DL320 Gen11Dell vs HPEDL320 Gen11 vs SR635 V3HPE vs LenovoDL320 Gen12 vs SR635 V3HPE vs LenovoDL325 Gen11 vs SR635 V3HPE vs Lenovo

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