Head-to-head · every figure from the vendor documents
Dell R640 vs Lenovo SR630 V4
A specification-by-specification comparison of the Dell PowerEdge R640 and the Lenovo ThinkSystem SR630 V4, built from Dell’s and Lenovo’s own documents. 1 headline measure favours the R640, 4 favour the SR630 V4, and they share no processors.
Bottom line. R640 leads on storage density. SR630 V4 leads on virtualisation, databases and in-memory work, network throughput. 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.
R6402
Processor sockets
SR630 V42
R64056
Cores, fully populated
Largest listed processor × its socket count
SR630 V4288Higher
R6401.53 TB
Memory ceiling
As each document states it
SR630 V48 TBHigher
R64018Higher
Drive bays
SR630 V416
R640Up to 3
Accelerators
SR630 V4Up to 3
R6401,600 W
Largest power supply
SR630 V42,000 WHigher
R6401U Rack
Rack height
SR630 V41U Rack
R64025 GbE class
Fastest network option
SR630 V4800 GbE classHigher
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 R640 if…
Drive bays: 18 against 16 on the SR630 V4
Slot count does not drop with the rack unit: the 2U members of this generation carry the same 24 DDR4 slots, so a memory-hungry workload costs no extra height here.
Choose the SR630 V4 if…
Cores, fully populated: 288 against 56 on the R640
Memory ceiling: 8 TB against 1.53 TB on the R640
Largest power supply: 2,000 W against 1,600 W on the R640
Two processor families in one 1U chassis: 27 Xeon 6 P-core SKUs of up to 86 cores, and seven 6700E E-core SKUs of up to 144 cores for thread-dense scale-out work.
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.
VirtualisationR640: 56 cores with 1.53 TB. SR630 V4: 288 cores with 8 TB.SR630 V4
Databases & in-memoryMemory ceiling 1.53 TB against 8 TB, across 24 and 32 DIMM slots.SR630 V4
Storage density18 bays in 1U against 16 in 1U.R640
AI & acceleration3 accelerators against 3 in the vendor documents.Line ball
Network throughputFastest card listed: 25 GbE class against 800 GbE class.SR630 V4
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.
Bay counts are the maximum each document states, including rear and mid-chassis positions.
Specification
R640
SR630 V4
Maximum bays
18
16
Documented layouts
6
14
Bay sizes
2.5-inch · 3.5-inch
2.5-inch · E3.S
Boot devices
BOSS - HW RAID controller presenting M.2 SATA · IDSDM (2 x microSD, 16/32/64 GB) and/or vFlash (1 x 16 GB microSD), in a dedicated proprietary PCIe x1 slot at the rear using a USB 3.0 interface
Chassis depthVendors measure depth differently — see each data sheet
Table 3: height 42.8 mm, width 482.0 mm, depth 808.5 mm, weight 21.9 kg, "Dimensions include bezel". The Appendix A figures instead give 718.89 mm bezel to die-casting rear wall, 737.19 mm bezel to rear wall PCIe area and 757.75 mm bezel to rear PSU handle (705.05 / 723.35 / 743.91 mm from the front plate). The guide does not reconcile the 808.5 mm figure with those measurements.
788 mm (31 in.)
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.
R640: processors by cores and TDP
Intel Xeon Processor Scalable Family 70Bubble size = L3 cache · hover a bubble for the full SKU
SR630 V4: processors by cores and TDP
Xeon 6 P-core 27Xeon 6 E-core 7Bubble size = L3 cache · hover a bubble for the full SKU
R640: memory with every slot filled
SR630 V4: memory with every slot filled
R640: drive bays
Front panel
10 × 2.5" NVMe at the front — 10 bays in total.
SAS/SATANVMeSAS/SATA + NVMe
SR630 V4: drive bays
Front panel
10 × 2.5" SAS/SATA at the front — 10 bays in total.
SAS/SATANVMeSAS/SATA + NVMe
R640: power supplies
AC−48 V DC
SR630 V4: power supplies
AC277 VAC / HVDC−48 V DC
07 — Questions
R640 vs SR630 V4, answered
Is the R640 or the SR630 V4 the faster server?
Neither document publishes benchmark results, so this page compares what they do state. The R640 lists 70 processors up to 28 cores at 205 W; the SR630 V4 lists 34 up to 144 cores at 350 W. Fully populated that is 56 cores against 288.
Which holds more memory?
The R640 has 24 DIMM slots and a stated ceiling of RDIMM 1.53 TB; LRDIMM 3 TB; NVDIMM 192 GB; PMem 6.14 TB. The SR630 V4 has 32 and 8 TB.
Which takes more drives?
R640: 18 bays across 6 documented layouts. SR630 V4: 16 across 14. Counts include rear and mid-chassis positions where the vendor documents them.
Can either take GPUs?
R640: up to 3 accelerators, 0 double-wide cards listed. SR630 V4: up to 3, 0 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. R640: Dell EMC PowerEdge R640 Technical Guide (Rev. A10, August 2022) (Dell document). SR630 V4: Lenovo ThinkSystem SR630 V4 Server Product Guide (September 8, 2026 (created or updated)) (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.