Dell XE7740 vs Lenovo SR650 V4
A specification-by-specification comparison of the Dell PowerEdge XE7740 and the Lenovo ThinkSystem SR650 V4, built from Dell’s and Lenovo’s own documents. 1 headline measure favours the XE7740, 4 favour the SR650 V4, and 3 processors appear in both lists.
Bottom line. XE7740 leads on AI and acceleration. SR650 V4 leads on virtualisation, databases and in-memory work, storage density, network throughput. Neither vendor publishes benchmarks for these machines, so every call here is made on what their documents state.
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.
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 XE7740 if…
- Accelerators: Up to 16 against Up to 10 on the SR650 V4
- Eight double-wide slots at up to 600 W accept five different cards — NVIDIA H100 NVL, H200 NVL, L40S and RTX Pro 6000, or Intel Gaudi 3 — or sixteen single-width L4s.
Choose the SR650 V4 if…
- Memory ceiling: 8 TB against 4 TB on the XE7740
- Drive bays: 40 against 8 on the XE7740
- Rack height: 2U Rack against 4U Rack on the XE7740
- Up to 36 NVMe drives — 24 front, 8 mid and 4 rear — connect straight to the processors on a full x4 link each, so an all-flash build needs no retimer adapters.
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.
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.
| Specification | XE7740 | SR650 V4 |
|---|---|---|
| Processors listed | 3 | 27 |
| Single-processor option | No | Yes |
Memory
| Specification | XE7740 | SR650 V4 |
|---|---|---|
| Largest module listed | 128 GB | 256 GB |
| Fastest rated speed | 6,400 MT/s | 8,000 MT/s |
| Memory types | RDIMM DDR5-6400 | RDIMM DDR5-6400 · 3DS RDIMM DDR5-6400 · MRDIMM DDR5-8000 (8800 rated) · CXL 2.0 E3.S 2T memory modules |
Storage
Bay counts are the maximum each document states, including rear and mid-chassis positions.
| Specification | XE7740 | SR650 V4 |
|---|---|---|
| Maximum bays | 8 | 40 |
| Documented layouts | 1 | 16 |
| Bay sizes | E3.S | 3.5-inch · 2.5-inch · E3.S |
| Boot devices | BOSS-N1 DC-MHS (HW RAID 1, 2 x M.2 NVMe SSD) | Internal M.2 RAID B550i-2i SATA/NVMe Enablement Kit (2 x M.2 NVMe, integrated Broadcom RAID) · Internal M.2 RAID B545i-2i SATA/NVMe Adapter (2 x M.2 SATA/NVMe, integrated Broadcom RAID) · Internal M.2 B350i-2i NVMe Enablement Kit (2 x M.2 NVMe x2, VROC RAID) + 4 more |
| Storage controllers | 1 | 24 |
Accelerators & I/O
| Specification | XE7740 | SR650 V4 |
|---|---|---|
| Accelerators supported | Up to 16 | Up to 10 |
| Double-wide cards listed | 5 | 2 |
| OCP slots | 1 | 2 |
| PCIe network slots | 8 | 10 |
| Network cards listed | 11 | 31 |
Power & platform
| Specification | XE7740 | SR650 V4 |
|---|---|---|
| Power-supply options | 3 | 14 |
| Output range | 2,400–3,200 W | 800–3,200 W |
| Input types | AC · 277 VAC / HVDC | AC · 277 VAC / HVDC · −48 V DC |
| Management | iDRAC10 | XClarity Controller 3 |
| Chassis depthVendors measure depth differently — see each data sheet | 899.56 mm with bezel / 886.73 mm without bezel | 796 mm |
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.
XE7740: processors by cores and TDP
SR650 V4: processors by cores and TDP
XE7740: memory with every slot filled
SR650 V4: memory with every slot filled
XE7740: drive bays
Front panel
8 × EDSFF NVMe at the front — 8 bays in total.
SR650 V4: drive bays
Front panel
12 × 3.5" SAS/SATA at the front — 12 bays in total.
XE7740: power supplies
SR650 V4: power supplies
3 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: 0 more are exclusive to the XE7740 and 24 to the SR650 V4.
| Processor | Cores | TDP |
|---|---|---|
| Intel Xeon 6 6787P | 86 | 350 W |
| Intel Xeon 6 6767P | 64 | 350 W |
| Intel Xeon 6 6747P | 48 | 330 W |
XE7740 vs SR650 V4, answered
Is the XE7740 or the SR650 V4 the faster server?
Neither document publishes benchmark results, so this page compares what they do state. The XE7740 lists 3 processors up to 86 cores at 350 W; the SR650 V4 lists 27 up to 86 cores at 350 W. Fully populated that is 172 cores against 172.
Which holds more memory?
The XE7740 has 32 DIMM slots and a stated ceiling of 4 TB. The SR650 V4 has 32 and 8 TB.
Which takes more drives?
XE7740: 8 bays across 1 documented layouts. SR650 V4: 40 across 16. Counts include rear and mid-chassis positions where the vendor documents them.
Can either take GPUs?
XE7740: up to 16 accelerators, 5 double-wide cards listed. SR650 V4: up to 10, 2 double-wide listed.
Do they share any processors?
Yes — 3 processors appear in both documents, including the Intel Xeon 6 6787P. That makes a like-for-like build possible on either server.
Where these figures come from. XE7740: Dell PowerEdge XE7740 Technical Guide (Rev. A04, April 2026) (Dell document). SR650 V4: Lenovo ThinkSystem SR650 V4 Server (September 8, 2026) (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
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.