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

Dell R770AP vs Lenovo SR665 V3

A specification-by-specification comparison of the Dell PowerEdge R770AP and the Lenovo ThinkSystem SR665 V3, built from Dell’s and Lenovo’s own documents. 1 headline measure favours the R770AP, 5 favour the SR665 V3, and they share no processors.

Bottom line. SR665 V3 leads on virtualisation, databases and in-memory work, 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 R770AP front view with 32 EDSFF E3.S NVMe bays in four groups of eight around a blank centre panel
Dell PowerEdge
R770AP
2U Rack2 sockets24 DIMMiDRAC10
Configure the R770AP →Full data sheet
VS
Lenovo ThinkSystem SR665 V3 front: 24 numbered 2.5-inch drive bays, VGA and diagnostics ports at left, two USB ports at right
Lenovo ThinkSystem
SR665 V3
2U Rack2 sockets24 DIMMXClarity Controller 2
Configure the SR665 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.

2
Processor sockets
2
256
Cores, fully populated
Largest listed processor × its socket count
Higher320
3 TB
Memory ceiling
As each document states it
Higher6 TB
32
Drive bays
Higher40
None listed
Accelerators
HigherUp to 7
3,200 WHigher
Largest power supply
2,600 W
2U Rack
Rack height
2U Rack
200 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 R770AP if…

  • Largest power supply: 3,200 W against 2,600 W on the SR665 V3
  • Up to 128 P-cores and 504 MB of cache per socket, with 72- and 96-core parts for workloads that favour clock speed over core count.

Choose the SR665 V3 if…

  • Cores, fully populated: 320 against 256 on the R770AP
  • Memory ceiling: 6 TB against 3 TB on the R770AP
  • Drive bays: 40 against 32 on the R770AP
  • Lenovo lists 48 processors across two EPYC generations in one chassis, spanning 8 cores (EPYC 9015) to 160 (EPYC 9845) at up to 400 W.
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.

VirtualisationR770AP: 256 cores with 3 TB. SR665 V3: 320 cores with 6 TB.SR665 V3
Databases & in-memoryMemory ceiling 3 TB against 6 TB, across 24 and 24 DIMM slots.SR665 V3
Storage density32 bays in 2U against 40 in 2U.SR665 V3
AI & accelerationno accelerators against 7 in the vendor documents.SR665 V3
Network throughputFastest card listed: 200 GbE class against 400 GbE class.SR665 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.

SpecificationR770APSR665 V3
Processors listed548
Most cores per processor128160
Highest processor TDP500 W400 W
Processor familiesXeon 6 6900PAMD EPYC 9005 · AMD EPYC 9004
Single-processor optionNoYes

Memory

SpecificationR770APSR665 V3
Largest module listed128 GB256 GB
Memory typesRDIMM 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.

SpecificationR770APSR665 V3
Maximum bays3240
Documented layouts419
Bay sizes2.5-inch · E3.S3.5-inch · 2.5-inch
Boot devicesBOSS-N1 DC-MHS (optional, rear)M.2 SATA/x4 NVMe 2-Bay Adapter (4Y37A79663) · M.2 NVMe 2-Bay RAID Adapter (4Y37A09750) · M.2 RAID B540i-2i SATA/NVMe Adapter (4Y37A90063) + 4 more
Storage controllers120

Accelerators & I/O

SpecificationR770APSR665 V3
Accelerators supportedNone listedUp to 7
Double-wide cards listed06
OCP slots21
PCIe network slots512
Network cards listed1232

Power & platform

SpecificationR770APSR665 V3
Power-supply options510
Output range1,500–3,200 W750–2,600 W
Input typesAC · 277 VAC / HVDCAC · −48 V DC
ManagementiDRAC10XClarity Controller 2
Chassis depthVendors measure depth differently — see each data sheet—766 mm
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.

R770AP: processors by cores and TDP

Dell PowerEdge R770AP processors081624324048566472808896104112120128400 W450 W500 WCores per processorIntel Xeon 6 6980P — 128 cores / 256 threads · 500 W · 2 GHz base · 504 MB cache · DDR5-6400Intel Xeon 6 6978P — 120 cores / 240 threads · 500 W · 2.1 GHz base · 504 MB cache · DDR5-6400Intel Xeon 6 6972P — 96 cores / 192 threads · 500 W · 2.4 GHz base · 480 MB cache · DDR5-6400Intel Xeon 6 6952P — 96 cores / 192 threads · 400 W · 2.1 GHz base · 480 MB cache · DDR5-6400Intel Xeon 6 6960P — 72 cores / 144 threads · 500 W · 2.7 GHz base · 432 MB cache · DDR5-64006 6980P128 cores · 3.9 W/core — top SKU and most efficient
Xeon 6 6900P 5Bubble size = L3 cache · hover a bubble for the full SKU

SR665 V3: processors by cores and TDP

Lenovo ThinkSystem SR665 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 9684X — 96 cores / 192 threads · 400 W · 2.55 GHz base · 1150 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 9384X — 32 cores / 64 threads · 320 W · 3.1 GHz base · 768 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 9184X — 16 cores / 32 threads · 320 W · 3.55 GHz base · 768 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 23Bubble size = L3 cache · hover a bubble for the full SKU

R770AP: memory with every slot filled

32 GB768 GB64 GB1.5 TB96 GB2.3 TB128 GB3 TB24 slots · 12 per processor · each tick = one DIMM

SR665 V3: 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

R770AP: drive bays

Front panel

32 × EDSFF NVMe at the front — 32 bays in total.

SAS/SATANVMeSAS/SATA + NVMe

SR665 V3: drive bays

Front panel

24 × 2.5" SAS/SATA at the front — 24 bays in total.

SAS/SATANVMeSAS/SATA + NVMe

R770AP: power supplies

05001000150020002500300035001500 W Titanium — 100-240 VAC (derated to 1050 W at 100-120 VAC); 240 VDC HVDC variant China only; 60 mm; C131500Titanium1800 W Titanium — 200-240 VAC HLAC; 240 VDC HVDC variant China only; 60 mm; C151800Titanium2400 W Titanium — 100-240 VAC (1400 W lowline); 240 VDC HVDC variant China only; 73.5 mm; C192400Titanium3200 W Titanium — 200-240 VAC (2900 W / 3200 W by input voltage); 240 VDC HVDC variant China only; 73.5 mm; C193200Titanium3200 W Titanium — 277 VAC or 336 VDC HVDC; 73.5 mm; APP/Saf-D-Grid; not available at product launch3200TitaniumWatts · dashed line = output at 100–120 V low line
AC277 VAC / HVDC

SR665 V3: power supplies

050010001500200025003000750 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 21800Titanium2400 W Platinum — AC input power - 80 PLUS Platinum efficiency; input 230V; max quantity 22400Platinum2600 W Titanium — AC input power - 80 PLUS Titanium efficiency; input 230V; max quantity 22600TitaniumWatts · dashed line = output at 100–120 V low line
AC−48 V DC
07 — Questions

R770AP vs SR665 V3, answered

Is the R770AP or the SR665 V3 the faster server?

Neither document publishes benchmark results, so this page compares what they do state. The R770AP lists 5 processors up to 128 cores at 500 W; the SR665 V3 lists 48 up to 160 cores at 400 W. Fully populated that is 256 cores against 320.

Which holds more memory?

The R770AP has 24 DIMM slots and a stated ceiling of 3 TB. The SR665 V3 has 24 and 6 TB.

Which takes more drives?

R770AP: 32 bays across 4 documented layouts. SR665 V3: 40 across 19. Counts include rear and mid-chassis positions where the vendor documents them.

Can either take GPUs?

R770AP: no accelerator option in its document. SR665 V3: up to 7, 6 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. R770AP: Dell PowerEdge R770AP Technical Guide (May 2026) (Dell document). SR665 V3: Lenovo ThinkSystem SR665 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

R760 vs SR665 V3Dell vs LenovoR7625 vs SR665 V3Dell vs LenovoR770 vs SR665 V3Dell vs LenovoR770AP vs DL385 Gen11Dell vs HPER7725 vs SR665 V3Dell vs LenovoR7725xd vs SR665 V3Dell vs LenovoDL380 Gen12 vs SR665 V3HPE vs LenovoDL385 Gen11 vs SR665 V3HPE vs Lenovo

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