UK’s trusted IT infrastructure partner since 2003
sales@servnetuk.com
0800 987 4111
Servnet
FinanceToolsConfiguratorGet in Touch
Head-to-head · every figure from the vendor documents

HPE DL340 Gen12 vs Lenovo SR655 V3

A specification-by-specification comparison of the HPE ProLiant Compute DL340 Gen12 and the Lenovo ThinkSystem SR655 V3, built from HPE’s and Lenovo’s own documents. 2 headline measures favour the DL340 Gen12, 3 favour the SR655 V3, and they share no processors.

Bottom line. DL340 Gen12 leads on virtualisation, databases and in-memory work. SR655 V3 leads on storage density, AI and acceleration. Neither vendor publishes benchmarks for these machines, so every call here is made on what their documents state.

HPE ProLiant Compute DL340 Gen12 Front GPU chassis: twelve E3.S drives in the centre box between two vented GPU cages, badge on the right ear
HPE ProLiant
DL340 Gen12
2U Rack1 socket16 DIMMHPE iLO 7
Configure the DL340 Gen12 →Full data sheet
VS
Lenovo ThinkSystem SR655 V3 2U chassis from the front: 24 numbered 2.5-inch hot-swap bays, VGA port on the left, USB ports on the right
Lenovo ThinkSystem
SR655 V3
2U Rack1 socket12 DIMMXClarity Controller 2
Configure the SR655 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
144
Cores, fully populated
Largest listed processor × its socket count
Higher160
4 TBHigher
Memory ceiling
As each document states it
3 TB
36
Drive bays
Higher40
Up to 4
Accelerators
HigherUp to 8
3,200 WHigher
Largest power supply
2,600 W
2U Rack
Rack height
2U Rack
400 GbE class
Fastest network option
400 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 DL340 Gen12 if…

  • Memory ceiling: 4 TB against 3 TB on the SR655 V3
  • Largest power supply: 3,200 W against 2,600 W on the SR655 V3
  • Three factory chassis on one single-socket platform: SFF for up to 24 × 2.5-inch or 36 × E3.S drives, LFF for 12 × 3.5-inch, and a Front GPU model that HPE documents with four double-wide accelerators.

Choose the SR655 V3 if…

  • Cores, fully populated: 160 against 144 on the DL340 Gen12
  • Drive bays: 40 against 36 on the DL340 Gen12
  • Accelerators: Up to 8 against Up to 4 on the DL340 Gen12
  • A whole 2U storage chassis on one processor: drive bays at the front, in the middle and at the rear reach 40 × 2.5-inch or 20 × 3.5-inch, and up to 32 of the 2.5-inch bays can be NVMe through switch adapters, or 24 when each drive needs its own x4 link.
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.

VirtualisationDL340 Gen12: 144 cores with 4 TB. SR655 V3: 160 cores with 3 TB.DL340 Gen12
Databases & in-memoryMemory ceiling 4 TB against 3 TB, across 16 and 12 DIMM slots.DL340 Gen12
Storage density36 bays in 2U against 40 in 2U.SR655 V3
AI & acceleration4 accelerators against 8 in the vendor documents.SR655 V3
Network throughputFastest card listed: 400 GbE class against 400 GbE class.Line ball
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.

SpecificationDL340 Gen12SR655 V3
Processors listed3345
Most cores per processor144160
Highest processor TDP350 W400 W
Processor familiesXeon 6 E-core · Xeon 6 P-coreAMD EPYC 9005 · AMD EPYC 9004

Memory

SpecificationDL340 Gen12SR655 V3
DIMM slots1612
Slots per processor1612
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.

SpecificationDL340 Gen12SR655 V3
Maximum bays3640
Documented layouts724
Bay sizes2.5-inch · E3.S · 3.5-inch3.5-inch · 2.5-inch
Boot devicesHPE NS204i-u v2 480GB NVMe Hot Plug Boot Optimized Storage Device · HPE NS204i-u v2 960GB NVMe Hot Plug Boot Optimized Storage Device · HPE NS204i-u v2 960GB NVMe SED Hot Plug Boot Optimized Storage Device + 2 moreM.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 controllers1222

Accelerators & I/O

SpecificationDL340 Gen12SR655 V3
Accelerators supportedUp to 4Up to 8
Double-wide cards listed07
OCP slots41
PCIe network slots210
Network cards listed3032

Power & platform

SpecificationDL340 Gen12SR655 V3
Power-supply options710
Output range800–3,200 W750–2,600 W
ManagementHPE iLO 7XClarity Controller 2
Chassis depthVendors measure depth differently — see each data sheet8SFF/24SFF/EDSFF chassis 63.95 cm (25.18 in) deep766 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.

DL340 Gen12: processors by cores and TDP

HPE ProLiant Compute DL340 Gen12 processors081624324048566472808896104112120128136144100 W150 W200 W250 W300 W350 WCores per processorIntel Xeon 6780E — 144 cores · 330 W · 2.2 GHz base · 108 MB cache · DDR5-6400Intel Xeon 6766E — 144 cores · 250 W · 1.9 GHz base · 108 MB cache · DDR5-6400Intel Xeon 6756E — 128 cores · 225 W · 1.8 GHz base · 96 MB cache · DDR5-6400Intel Xeon 6746E — 112 cores · 250 W · 2 GHz base · 96 MB cache · DDR5-5600Intel Xeon 6731E — 96 cores · 250 W · 2.2 GHz base · 96 MB cache · DDR5-5600Intel Xeon 6740E — 96 cores · 250 W · 2.4 GHz base · 96 MB cache · DDR5-6400Intel Xeon 6710E — 64 cores · 205 W · 2.4 GHz base · 96 MB cache · DDR5-5600Intel Xeon 6787P — 86 cores · 350 W · 2 GHz base · 336 MB cache · DDR5-6400Intel Xeon 6781P — 80 cores · 350 W · 2 GHz base · 336 MB cache · DDR5-6400Intel Xeon 6767P — 64 cores · 350 W · 2.4 GHz base · 336 MB cache · DDR5-6400Intel Xeon 6774P — 64 cores · 350 W · 2.5 GHz base · 336 MB cache · DDR5-6400Intel Xeon 6761P — 64 cores · 350 W · 2.5 GHz base · 336 MB cache · DDR5-6400Intel Xeon 6760P — 64 cores · 330 W · 2.2 GHz base · 320 MB cache · DDR5-6400Intel Xeon 6747P — 48 cores · 330 W · 2.7 GHz base · 288 MB cache · DDR5-6400Intel Xeon 6741P — 48 cores · 300 W · 2.5 GHz base · 288 MB cache · DDR5-6400Intel Xeon 6740P — 48 cores · 270 W · 2.1 GHz base · 288 MB cache · DDR5-6400Intel Xeon 6736P — 36 cores · 205 W · 2 GHz base · 144 MB cache · DDR5-6400Intel Xeon 6732P — 32 cores · 350 W · 3.8 GHz baseIntel Xeon 6745P — 32 cores · 300 W · 3.1 GHz base · 336 MB cache · DDR5-6400Intel Xeon 6737P — 32 cores · 270 W · 2.9 GHz base · 144 MB cache · DDR5-6400Intel Xeon 6730P — 32 cores · 250 W · 2.5 GHz base · 288 MB cache · DDR5-6400Intel Xeon 6731P — 32 cores · 245 W · 2.5 GHz base · 144 MB cache · DDR5-6400Intel Xeon 6530P — 32 cores · 225 W · 2.3 GHz base · 144 MB cache · DDR5-6400Intel Xeon 6527P — 24 cores · 255 W · 3 GHz base · 144 MB cache · DDR5-6400Intel Xeon 6521P — 24 cores · 225 W · 2.6 GHz base · 144 MB cache · DDR5-6400Intel Xeon 6520P — 24 cores · 210 W · 2.4 GHz base · 144 MB cache · DDR5-6400Intel Xeon 6725P — 16 cores · 235 W · 3.7 GHz base · 192 MB cache · DDR5-6400Intel Xeon 6517P — 16 cores · 190 W · 3.2 GHz base · 72 MB cache · DDR5-6400Intel Xeon 6515P — 16 cores · 150 W · 2.3 GHz base · 72 MB cache · DDR5-6400Intel Xeon 6511P — 16 cores · 150 W · 2.3 GHz base · 72 MB cache · DDR5-6400Intel Xeon 6505P — 12 cores · 150 W · 2.2 GHz base · 48 MB cache · DDR5-6400Intel Xeon 6507P — 8 cores · 150 W · 3.5 GHz base · 48 MB cache · DDR5-6400Intel Xeon 6503P — 8 cores · 135 W · 2.8 GHz base · 48 MB cache · DDR5-64006780E144 cores — the top SKU6766E1.7 W/core — most efficient
Xeon 6 E-core 7Xeon 6 P-core 26Bubble size = L3 cache · hover a bubble for the full SKU

SR655 V3: processors by cores and TDP

Lenovo ThinkSystem SR655 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

DL340 Gen12: memory with every slot filled

16 GB256 GB32 GB512 GB64 GB1 TB96 GB1.5 TB128 GB2 TB256 GB4 TB16 slots · 16 per processor · each tick = one DIMM

SR655 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

DL340 Gen12: drive bays

Front panel

8 × 2.5" NVMe at the front — 8 bays in total.

SAS/SATANVMeSAS/SATA + NVMe

SR655 V3: drive bays

Front panel

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

SAS/SATANVMeSAS/SATA + NVMe

DL340 Gen12: power supplies

0500100015002000250030003500800 W Platinum — HPE M-CRPS family (Modular Common Redundant Power Supply). Listed only in the Core Options power-supply list, not in the Standard Features power-supply prose.800Platinum1000 W Titanium — HPE M-CRPS family; 96% efficiency; single-output, EU ErP Lot 9 compliant. Rated 800W at 100-120 VAC, 1000W at 200-240 VAC, 1000W at 240 VDC (China only).1000Titanium1300 W null — HPE M-CRPS family; -48VDC input; no efficiency rating printed. Requires power cord P79842-B21 or power lug kit P79845-B21.1300DC1500 W Titanium — HPE M-CRPS family; 96% efficiency; single-output, EU ErP Lot 9 compliant. Rated 1000W at 100 VAC, 1100W at 110-120 VAC, 1500W at 200-240 VAC.1500Titanium2200 W null — HPE M-CRPS family; -48VDC input; no efficiency rating printed. Requires power cord P73874-B21 or power lug kit P79839-B21.2200DC2400 W Titanium — HPE M-CRPS family; 96% efficiency; single-output, EU ErP Lot 9 compliant. Rated 1200W at 100-127 VAC, 2400W at 200-240 VAC.2400Titanium3200 W Titanium — HPE M-CRPS family; 96% efficiency; single-output, EU ErP Lot 9 compliant. Rated 1600W at 100-127 VAC, 3200W at 200-240 VAC.3200TitaniumWatts · dashed line = output at 100–120 V low line
AC−48 V DC

SR655 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 — 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

DL340 Gen12 vs SR655 V3, answered

Is the DL340 Gen12 or the SR655 V3 the faster server?

Neither document publishes benchmark results, so this page compares what they do state. The DL340 Gen12 lists 33 processors up to 144 cores at 350 W; the SR655 V3 lists 45 up to 160 cores at 400 W. Fully populated that is 144 cores against 160.

Which holds more memory?

The DL340 Gen12 has 16 DIMM slots and a stated ceiling of 4TB. The SR655 V3 has 12 and 3 TB.

Which takes more drives?

DL340 Gen12: 36 bays across 7 documented layouts. SR655 V3: 40 across 24. Counts include rear and mid-chassis positions where the vendor documents them.

Can either take GPUs?

DL340 Gen12: up to 4 accelerators, 0 double-wide cards listed. SR655 V3: up to 8, 7 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. DL340 Gen12: HPE ProLiant Compute DL340 Gen12 QuickSpecs (Version 15 - 08-September-2026) (HPE document). SR655 V3: Lenovo ThinkSystem SR655 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

R570 vs SR655 V3Dell vs LenovoR7615 vs SR655 V3Dell vs LenovoR7715 vs SR655 V3Dell vs LenovoR570 vs DL340 Gen12Dell vs HPER7615 vs DL340 Gen12Dell vs HPEDL340e Gen12 vs SR655 V3HPE vs LenovoDL345 Gen11 vs SR655 V3HPE vs LenovoDL345 Gen12 vs SR655 V3HPE vs Lenovo

Talk to a UK specialist

Get expert advice or a no-obligation quote — servers, storage, networking, maintenance, finance and cloud. We reply the same working day.

or call 0800 987 4111