Head-to-head · every figure from the vendor documents
Dell R770 vs Lenovo SR650 V3
A specification-by-specification comparison of the Dell PowerEdge R770 and the Lenovo ThinkSystem SR650 V3, built from Dell’s and Lenovo’s own documents. 4 headline measures favour the R770, 1 favours the SR650 V3, and they share no processors.
Bottom line. R770 leads on virtualisation, storage density, network throughput. SR650 V3 leads on AI and acceleration. Neither vendor publishes benchmarks for these machines, so every call here is made on what their documents state.
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
288Higher
Cores, fully populated
Largest listed processor × its socket count
128
8 TB
Memory ceiling
As each document states it
8 TB
44Higher
Drive bays
40
Up to 6
Accelerators
HigherUp to 8
3,200 WHigher
Largest power supply
2,600 W
2U Rack
Rack height
2U Rack
400 GbE classHigher
Fastest network option
200 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 R770 if…
Cores, fully populated: 288 against 128 on the SR650 V3
Drive bays: 44 against 40 on the SR650 V3
Largest power supply: 3,200 W against 2,600 W on the SR650 V3
Forty front E3.S Gen5 bays plus four at the rear; Dell puts the front alone at 2457.6 TB raw.
Choose the SR650 V3 if…
Accelerators: Up to 8 against Up to 6 on the R770
Three drive zones — front, mid-chassis and rear — take the 2U chassis to 40 × 2.5-inch or 20 × 3.5-inch bays, and up to 36 NVMe drives can each run on a dedicated x4 link with no oversubscription.
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.
VirtualisationR770: 288 cores with 8 TB. SR650 V3: 128 cores with 8 TB.R770
Databases & in-memoryMemory ceiling 8 TB against 8 TB, across 32 and 32 DIMM slots.Line ball
Storage density44 bays in 2U against 40 in 2U.R770
AI & acceleration6 accelerators against 8 in the vendor documents.SR650 V3
Network throughputFastest card listed: 400 GbE class against 200 GbE class.R770
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.
Chassis depthVendors measure depth differently — see each data sheet
801.51 mm without bezel (rear I/O) / 814.52 mm without bezel (front I/O)
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.
R770: processors by cores and TDP
Xeon 6 E-core 6Xeon 6 P-core 17Bubble size = L3 cache · hover a bubble for the full SKU
SR650 V3: processors by cores and TDP
5th Gen Xeon Scalable 324th Gen Xeon Scalable 52Bubble size = L3 cache · hover a bubble for the full SKU
R770: memory with every slot filled
SR650 V3: memory with every slot filled
R770: drive bays
Front panel
40 × EDSFF NVMe at the front — 40 bays in total.
SAS/SATANVMeSAS/SATA + NVMe
SR650 V3: drive bays
Front panel
24 × 2.5" SAS/SATA at the front — 24 bays in total.
SAS/SATANVMeSAS/SATA + NVMe
R770: power supplies
AC277 VAC / HVDC
SR650 V3: power supplies
AC−48 V DC
07 — Questions
R770 vs SR650 V3, answered
Is the R770 or the SR650 V3 the faster server?
Neither document publishes benchmark results, so this page compares what they do state. The R770 lists 23 processors up to 144 cores at 350 W; the SR650 V3 lists 84 up to 64 cores at 385 W. Fully populated that is 288 cores against 128.
Which holds more memory?
The R770 has 32 DIMM slots and a stated ceiling of 8 TB. The SR650 V3 has 32 and 8 TB.
Which takes more drives?
R770: 44 bays across 11 documented layouts. SR650 V3: 40 across 20. Counts include rear and mid-chassis positions where the vendor documents them.
Can either take GPUs?
R770: up to 6 accelerators, 5 double-wide cards listed. SR650 V3: up to 8, 1 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. R770: Dell PowerEdge R770 Technical Guide (May 2026) (Dell document). SR650 V3: Lenovo ThinkSystem SR650 V3 Server Product Guide (publication date is not printed in the text export) (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.