The ThinkSystem SR630 V4 is Lenovo’s 1U two-socket rack server for Intel Xeon 6, and unlike the 2U SR650 V4 it also accepts the E-core 6700E series, with up to 144 cores per socket. This data sheet sets out what fits into 43 mm of rack height — drives, slots, GPUs and five cooling options — and where the 1U format forces a compromise.
Our read of Lenovo’s documentation: where the SR630 V4 is strong, and the limits worth knowing before you spec one.
Strengths
+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.
+Up to 16 E3.S 1T NVMe drives, or 12 × 2.5-inch including two at the rear, with every NVMe drive on its own x4 link and no retimer adapter.
+Five ways to cool the processors, including a closed-loop Neptune Air module whose coolant circulates inside the server — an option absent from the SR650 V4 guide — plus two open-loop Neptune modules.
+Two rear OCP 3.0 slots, where the SR630 V3 had one, each PCIe 5.0 at x8 or x16, beside up to three PCIe 5.0 slots.
+Ten hot-swap supply choices from 800 W to 2000 W, including 1300 W units for HVAC/HVDC or −48 V DC power.
Watch-outs
!Only three PCIe slots, and they go quickly: rear 2.5-inch bays leave slot 1 alone, the rear hot-swap M.2 cage takes slot 3’s place, and slot 3 also needs the second processor.
!No 3.5-inch bays at all — the V3 offered four — and no onboard SATA, so SATA drives need a RAID adapter or HBA.
!E-core processors take RDIMMs only (no 3DS, MRDIMM or CXL), lack Hyper-Threading and AMX, and have a shorter OS list with ESXi support starting at 9.1.
!GPUs stop at three single-wide cards of up to 75 W; they need Performance fans and are excluded by the 7DK1 water-cooled and Neptune Air builds.
!E3.S builds grow to 845 mm deep, lose the front USB and Mini DisplayPort, and fit only Long Travel rails.
Processors34 SKUs
Cores / CPU8–144
DIMM slots32
Backplanes14
Max bays16
GPUsup to 3
PSU options10 · to 2,000 W
02 — Processors
34 supported processors, mapped
Lenovo lists 34 processors: 27 Xeon 6 P-core parts (6500P and 6700P, 8 to 86 cores, 135 to 350 W) and seven Xeon 6700E E-core parts (64 to 144 cores, 205 to 330 W). Both families give each socket eight DDR5 channels and 88 PCIe lanes; the charts below colour them separately.
Processor landscape — cores × TDP
34 SKUs · 2 families
Xeon 6 P-core 27Xeon 6 E-core 7Bubble size = L3 cache · hover a bubble for the full SKU
Processor explorer
filter · sort · compare
Processor
Cores / threads
Base
L3 cache
TDP
W / core
Memory
Intel Xeon 6 6780E
144 / 144
2.2 GHz
108 MB
330 W
2.3
DDR5-6400
Intel Xeon 6 6766E
144 / 144
1.9 GHz
108 MB
250 W
1.7
DDR5-6400
Intel Xeon 6 6756E
128 / 128
1.8 GHz
96 MB
225 W
1.8
DDR5-6400
Intel Xeon 6 6746E
112 / 112
2 GHz
96 MB
250 W
2.2
DDR5-5600
Intel Xeon 6 6731E
96 / 96
2.2 GHz
96 MB
250 W
2.6
DDR5-5600
Intel Xeon 6 6740E
96 / 96
2.4 GHz
96 MB
250 W
2.6
DDR5-6400
Intel Xeon 6 6787P
86 / 172
2 GHz
336 MB
350 W
4.1
DDR5-6400
Intel Xeon 6 6781P
80 / 160
2 GHz
336 MB
350 W
4.4
DDR5-6400
Intel Xeon 6 6761P
64 / 128
2.5 GHz
336 MB
350 W
5.5
DDR5-6400
Intel Xeon 6 6767P
64 / 128
2.4 GHz
336 MB
350 W
5.5
DDR5-6400
Intel Xeon 6 6760P
64 / 128
2.2 GHz
320 MB
330 W
5.2
DDR5-6400
Intel Xeon 6 6710E
64 / 64
2.4 GHz
96 MB
205 W
3.2
DDR5-5600
Intel Xeon 6 6747P
48 / 96
2.7 GHz
288 MB
330 W
6.9
DDR5-6400
Intel Xeon 6 6741P
48 / 96
2.5 GHz
288 MB
300 W
6.3
DDR5-6400
Intel Xeon 6 6740P
48 / 96
2.1 GHz
288 MB
270 W
5.6
DDR5-6400
Intel Xeon 6 6736P
36 / 72
2 GHz
144 MB
205 W
5.7
DDR5-6400
Intel Xeon 6 6732P
32 / 64
3.8 GHz
144 MB
350 W
10.9
DDR5-6400
Intel Xeon 6 6745P
32 / 64
3.1 GHz
336 MB
300 W
9.4
DDR5-6400
Intel Xeon 6 6737P
32 / 64
2.9 GHz
144 MB
270 W
8.4
DDR5-6400
Intel Xeon 6 6730P
32 / 64
2.5 GHz
288 MB
250 W
7.8
DDR5-6400
Intel Xeon 6 6731P
32 / 64
2.5 GHz
144 MB
245 W
7.7
DDR5-6400
Intel Xeon 6 6530P
32 / 64
2.3 GHz
144 MB
225 W
7.0
DDR5-6400
Intel Xeon 6 6527P
24 / 48
3 GHz
144 MB
255 W
10.6
DDR5-6400
Intel Xeon 6 6521P
24 / 48
2.6 GHz
144 MB
225 W
9.4
DDR5-6400
Intel Xeon 6 6520P
24 / 48
2.4 GHz
144 MB
210 W
8.8
DDR5-6400
Intel Xeon 6 6725P
16 / 32
3.7 GHz
192 MB
235 W
14.7
DDR5-6400
Intel Xeon 6 6724P
16 / 32
3.6 GHz
72 MB
210 W
13.1
DDR5-6400
Intel Xeon 6 6517P
16 / 32
3.2 GHz
72 MB
190 W
11.9
DDR5-6400
Intel Xeon 6 6511P
16 / 32
2.3 GHz
72 MB
150 W
9.4
DDR5-6400
Intel Xeon 6 6515P
16 / 32
2.3 GHz
72 MB
150 W
9.4
DDR5-6400
Intel Xeon 6 6505P
12 / 24
2.2 GHz
48 MB
150 W
12.5
DDR5-6400
Intel Xeon 6 6714P
8 / 16
4 GHz
48 MB
165 W
20.6
DDR5-6400
Intel Xeon 6 6507P
8 / 16
3.5 GHz
48 MB
150 W
18.8
DDR5-6400
Intel Xeon 6 6503P
8 / 16
2.8 GHz
48 MB
135 W
16.9
DDR5-6400
Seven SKUs are single-socket only — 6511P, 6521P, 6731P, 6741P, 6761P, 6781P and the E-core 6731E — and are sold only in factory builds; the six P-core parts are also barred from the water-cooled 7DK1 model.
E-core parts have no Hyper-Threading, so 144 cores means 144 threads. Their UPI links run at 16, 20 or 24 GT/s by SKU, and the 6710E, 6731E and 6746E cap memory at 5600 MT/s.
Intel AMX is exclusive to the P-core processors; QAT, DLB, DSA and IAA engines appear on both families in differing numbers.
MRDIMMs need one of five 6700P SKUs: 6747P, 6761P, 6767P, 6781P or 6787P.
Lenovo’s internal testing credits the closed-loop Neptune Air module with a 56% fan-power saving per node and 5% at rack level.
03 — Memory
32 DIMM slots, 16 per processor
Thirty-two DDR5 slots — eight channels per processor, two DIMMs each — take the SR630 V4 to 8 TB with 256 GB 3DS RDIMMs on P-core processors. Standard RDIMMs are rated 6400 MT/s at one module per channel, dropping to 5200 MT/s when both sockets in a channel are filled; MRDIMMs reach 8000 MT/s, one per channel.
Capacity with every slot filled
by DIMM size
Operating speed
per Lenovo memory tables
Processor
1 DIMM / channel
2 DIMMs / channel
RDIMM, P-core or E-core
6400 MT/s*
5200 MT/s
3DS RDIMM (P-core only)
6400 MT/s
not stated
MRDIMM (6747P, 6761P, 6767P, 6781P, 6787P)
8000 MT/s
not supported
* The 6710E, 6731E and 6746E cap memory at 5600 MT/s; every other SKU runs RDIMMs at up to 6400 MT/s.
E-core builds are RDIMM-only, cannot use the 16 GB module, and take the 32 GB 1Rx4 part only as eight per processor.
A single-processor SR630 V4 has 16 usable DIMM slots; Lenovo’s one-processor summary quotes a 1 TB ceiling, although its memory table lists 256 GB 3DS RDIMMs at up to 16 per processor.
CXL 2.0 modules (96 or 128 GB) go in front E3.S 2T bays with P-core processors only. Lenovo’s summary allows eight (four per processor) while its CXL table lists 2, 4 or 6 per processor; the modules are not hot-swap and not supported on Windows Server or ESXi.
The 7DK1 Compute Complex Neptune build drops to 16 DIMMs, one per channel.
Installed RDIMMs must all be the same part, fitted in equal numbers to each processor.
04 — Storage
14 backplane options, up to 16 bays
The 1U chassis carries 2.5-inch or EDSFF E3.S drives at the front — never 3.5-inch — plus an optional pair of 2.5-inch hot-swap bays at the rear. The four layouts below are Lenovo’s documented maxima; the chart after them shows the 14 backplanes that build every combination.
Headline layouts
front panel view
Front panel
Rear module
Storage config 9: a 10-bay Gen5 NVMe front backplane plus a 2-bay NVMe rear backplane — 12 drives, each with its own x4 link. The rear bays leave only slot 1 for adapters.
SAS/SATANVMeSAS/SATA + NVMe
Controllers & boot
Onboard NVMe (PCIe 5.0) - Non RAID NVMe (BC4V), RAID via Intel VROC — Software RAID, none cache. onboard; CTO only
ThinkSystem 440-16e SAS/SATA PCIe Gen4 12Gb HBA — HBA. External SAS HBA (JBOD to external enclosures/tape), part 4Y37A09724 feature B8P7 - lp1971 L4079
The processors provide no SATA ports, so SAS and SATA drives run from a RAID adapter or HBA; onboard NVMe supports JBOD or Intel VROC RAID, and ESXi accepts VROC at RAID 1 only.
Tri-Mode (feature CH5Z) lets a RAID 940 drive U.3 NVMe alongside SAS and SATA on AnyBay bays at one PCIe lane per NVMe drive; Lenovo’s 10-bay AnyBay Tri-Mode layouts use the 940-16i.
A cabled internal (CFF) RAID adapter or HBA keeps the rear slots free in 2.5-inch layouts, but on the 10-bay AnyBay backplane it needs two processors unless Tri-Mode is used.
Front hot-swap M.2 is offered with 4- or 8-bay 2.5-inch fronts or up to 12 E3.S 1T drives; the rear hot-swap M.2 cage sits in slot 3’s position and cannot be combined with rear drives.
Rear 2.5-inch bays rule out open-loop water cooling as well as rear M.2, and leave slot 1 as the only PCIe slot.
Every documented backplane
14 with drive bays
2.5-inch3.5-inchEDSFF (E1.S / E3.S)
05 — Accelerators & I/O
GPUs, PCIe and networking
The SR630 V4 has room for three single-wide GPUs, each limited to 75 W and one per rear slot, and Lenovo currently lists only the NVIDIA L4 24 GB, a Controlled part. The cards must be identical, passively cooled GPUs call for Performance fans, and GPUs are not supported with Compute Complex water cooling or the Neptune Air module. Up to 3 × single-wide NVIDIA L4, in slots 1, 2 and 3.
NVIDIA L4 24GB PCIe Gen4 Passive GPU
single-wide
24GB · up to 3
I/O topology
88 lanes per CPU
Each processor brings 88 PCIe lanes and eight DDR5 channels, and every slot runs at PCIe 5.0. Riser 1 (slots 1 and 2) and the first OCP slot connect to CPU 1; Riser 2 (slot 3) and the second OCP slot connect to CPU 2, so a one-processor server keeps two PCIe slots and one OCP slot.
Slot layout C gives two full-height x16 slots rated at 150 W; the low-profile slots in layouts A and B are rated at 75 W.
Open-loop Processor Neptune Core cooling occupies slot 2’s space, leaving a full-height x16 slot 1 and a low-profile x16 slot 3, and holds the second OCP slot to x8.
Four-port 25GbE and 10GBase-T PCIe cards are given a different riser cage so that they can sit in a low-profile slot.
An x16 OCP connection needs the V4 1U/2U OCP x16 enablement cable kit, one per slot.
06 — Power & cooling
10 power supplies, 800–2,000 W
Ten hot-swap supplies are listed, from 800 W to 2000 W: Titanium and Platinum AC units in CRPS and CRPS Premium versions, plus two 1300 W units for HVAC/HVDC and −48 V DC power. Lenovo’s DCSC configurator works out the power draw of a build through Lenovo Capacity Planner.
AC277 VAC / HVDC−48 V DC
A single supply is allowed only with the 800 W or 1300 W Titanium CRPS Premium units; all other options have a minimum of two, and paired units must match.
All 800 W and 1300 W AC units run at 115 V as well as 230 V (the 1300 W becomes a 1000 W supply at 115 V); the 2000 W unit is 230 V only.
Zero-output (cold redundancy) mode, which parks one supply in standby at low load, works only on CRPS Premium units.
Up to eight 40 mm fans come as 2-in-1 modules — three modules with one processor, four with two — in Standard 28K single-rotor, Performance 28K dual-rotor or Ultra 31K dual-rotor form, and types cannot be mixed.
Lenovo’s figures for the −48 V supply disagree: −44 to −54 V DC in the power-supply notes, and −48 to −60 V DC with 29.8 A inlet current in the electrical section.
07 — Management, security & OS
Run it, secure it, choose the OS
Management
XClarity Controller 3 (XCC3) — OpenBMC firmware on an ASPEED AST2600
XCC3 Premier upgrade: remote KVM, virtual media, System Guard, Neighbor Groups, power capping
Rear 1GbE RJ-45 port dedicated to XCC · OCP-mounted 4-to-1 management port consolidation adapter
Redfish REST, IPMI 2.0 and SNMP v3 · IPMI-over-LAN off unless enabled
XClarity One, XClarity Integrator and XClarity Energy Manager
Front diagnostics port for the optional External Diagnostics Handset
MicroSD card slot for XCC storage
Security
TPM 2.0 Root of Trust module with Platform Firmware Resiliency (NIST SP 800-193)
NationZ TPM 2.0 option for customers in China
Secure Boot set in the factory or by the customer, and permanent once enabled
System Guard hardware-inventory monitoring (XCC3 Premier)
SEDs managed through KMIP key servers — IBM SKLM or Thales KeySecure
Intel TDX confidential computing and TME-MK memory encryption
CNSA and FIPS 140-3 security modes for XCC3 (Premier)
Compliant with NIST SP 800-147B · chassis intrusion switch and lockable front bezel as options
Operating systems
P-core: Windows Server 2022/2025, RHEL 9.4–9.8 and 10.0–10.2, SLES 15 SP6/SP7 and 16, Ubuntu 22.04/24.04/26.04, ESXi 8.0 U3, 9.0 and 9.1
E-core: Windows Server 2022/2025, RHEL 9.4, 9.6–9.8 and 10.0–10.2, SLES 15 SP6/SP7 and 16, Ubuntu 24.04/26.04, ESXi 9.1
VMware ESXi factory preload (8.0 U3, 9.0, 9.1), not available with an NVIDIA GPU
Nutanix AHV, customer-installed, via the Nutanix compute-only feature code
08 — Compare
SR630 V3 → SR630 V4
The SR630 V4 guide includes Lenovo’s own comparison with the 1U model it replaces. The V4 adds a second processor family and faster memory, and changes the storage mix: E3.S replaces E1.S, and the 3.5-inch and onboard SATA options go.
2 × 4th or 5th Gen Xeon Scalable · up to 64 cores · 350 W
2 × Xeon 6 P-core (up to 86 cores, 350 W) or E-core (up to 144 cores, 330 W)
Memory
DDR5 to 5600 MHz · RDIMM, 3DS and 9x4 RDIMM
DDR5 to 6400 MHz · RDIMM; P-cores add 3DS, MRDIMM and CXL
Maximum memory
8 TB · 32 DIMMs
8 TB · 32 DIMMs
Front storage
4 × 3.5", 10 × 2.5" or 16 × E1.S
10 × 2.5", 16 × E3.S 1T or 8 × E3.S 2T
Rear storage
2 × 2.5" or 2 × 7mm
2 × 2.5"
Boot
2 × internal M.2
Internal or hot-swap M.2
Onboard NVMe ports
16
16
Onboard SATA
Yes
No
PCIe slots
Rear: up to 2 × Gen5 + 1 × Gen4 · or 2 × Gen5 at the front
Up to 3 × Gen5, all at the rear
OCP 3.0
1 × PCIe Gen5 x16, rear or front
2 × PCIe Gen5 x16, rear
Management
XClarity Controller 2
XClarity Controller 3
AC power supplies
750, 1100, 1800 W (CFFv4)
800, 1300, 2000 W (CRPS)
Source: Lenovo Press LP1971 (SR630 V4 product guide), Table 2 — Comparing the SR630 V4 to the previous generation SR630 V3.
The SR630 V4 family side by side
The SR630 V4 is the 1U member of Lenovo’s Xeon 6 rack line. The SR650 V4 is its 2U counterpart with far more bays, slots and GPU room; the SR630 V3 is the model it replaces; the SR645 V3 is a 1U AMD EPYC alternative; and the SR850 V4 goes to four sockets in 2U. The comparison bars use each model’s own spec file.
This modelSiblings and successorEach value from that model’s own verified spec file · bars scale per column
Head-to-head comparisons
Every figure on this page, set against the machines buyers weigh it up with.
Four 1U builds drawn only from parts our configurator allows on the SR630 V4. Each link loads the build for editing, and we test the final combination against Lenovo’s slot, fan and thermal rules before quoting.
Cloud-native & containers
288-core E-core scale-out node
Two 144-core 6766E processors put 288 cores in one rack unit at 250 W each, for container and microservice farms that value core count above per-thread speed. E-cores take RDIMMs only, so sixteen 64 GB modules give 1 TB, and a 25GbE OCP adapter leaves every rear slot free.
2 × Xeon 6 6766E — 144 cores @ 1.9 GHz, 250 W each
16 × 64 GB TruDDR5 RDIMM — 1 TB
4 × 3.84 TB NVMe on a 10-bay NVMe backplane
2 × 480 GB M.2 NVMe boot on the B550i-2i, RAID 1
Intel E810-DA2 2 × 25GbE OCP 3.0
2 × 1300 W Titanium CRPS
Red Hat Enterprise Linux 9
E-core processors run without Hyper-Threading and accept RDIMMs only. Lenovo’s E-core OS list covers RHEL 9.4 and 9.6–9.8 but not 9.5, and ESXi only from 9.1.
Two 36-core 6736P processors at 205 W and sixteen 96 GB RDIMMs give 72 cores and 1.5 TB at one DIMM per channel in a single rack unit. Six NVMe drives on the 10-bay backplane leave room to grow, and the mirrored M.2 pair keeps the hypervisor off the datastore.
2 × Xeon 6 6736P — 36 cores @ 2 GHz, 205 W each
16 × 96 GB TruDDR5 RDIMM — 1.5 TB
6 × 7.68 TB NVMe on a 10-bay NVMe backplane
2 × 480 GB M.2 NVMe boot, RAID 1
Broadcom 57504 4 × 25GbE OCP 3.0
2 × 1300 W Titanium CRPS
VMware ESXi 9.0
ESXi supports Intel VROC for RAID 1 only, so protected local datastores on onboard NVMe are limited to mirrors; a RAID adapter is the alternative.
The 6724P pairs a 3.6 GHz base clock with just 16 cores per socket, which keeps per-core licence counts down. With Tri-Mode enabled, a RAID 940-16i protects U.3 NVMe drives in hardware across the 10-bay AnyBay backplane, and the same bays can take SAS or SATA SSDs later.
2 × Xeon 6 6724P — 16 cores @ 3.6 GHz, 210 W each
16 × 64 GB TruDDR5 RDIMM — 1 TB
6 × 3.84 TB NVMe on the 10-bay AnyBay backplane
RAID 940-16i with 4 GB flash, Tri-Mode
2 × 480 GB M.2 NVMe boot
Broadcom 57414 2 × 25GbE OCP 3.0
2 × 1300 W Titanium CRPS
Windows Server 2025
Tri-Mode works with U.3 drives only, giving every NVMe drive a single-lane connection to the adapter, and is switched on with feature CH5Z after a 940-8i or 940-16i is chosen.
Three NVIDIA L4 24 GB cards fill all three rear slots for video analytics or small-model inference, with a 100GbE OCP adapter carrying the traffic. Thirty-two-core 6530P processors at 225 W sit well below the chassis’s 350 W maximum.
2 × Xeon 6 6530P — 32 cores @ 2.3 GHz, 225 W each
3 × NVIDIA L4 24 GB
16 × 64 GB TruDDR5 RDIMM — 1 TB
4 × 7.68 TB NVMe on a 10-bay NVMe backplane
2 × 480 GB M.2 NVMe boot
Broadcom 57508 2 × 100GbE OCP 3.0
2 × 2000 W Titanium CRPS Premium (230 V)
Ubuntu Server 24.04 LTS
The L4 is a Controlled GPU and passively cooled, so Performance fans are mandatory. Using all three slots rules out rear drive bays, rear M.2, the 7DK1 water-cooled model and the Neptune Air module, and Lenovo will not preload ESXi alongside an NVIDIA GPU.
We don’t configure refurbished Lenovo systems, so the nearest re-certified equivalents are 1U two-socket Dell and HPE servers from the DDR4 generation. They make sense where rack density matters but PCIe 5.0, DDR5 and E-core processors don’t.
Gen10 Plus · re-certified
HPE ProLiant DL360 Gen10 Plus
1U · two 3rd Gen Xeon (Ice Lake)
32 DIMM slots · up to 8 TB DDR4-3200
Up to 10 × SFF / NVMe
PCIe 4.0 · iLO 5
Matches the SR630 V4’s 32 DIMM slots in the same 1U height — a sensible budget swap for VDI or VM hosts.
4, 8 or 10 × 2.5" (SAS/SATA, NVMe, AnyBay or mixed) · 4–16 × E3.S 1T · 4 or 8 × E3.S 2T · 1T/2T mixes
Rear
2 × 2.5" SAS/SATA, AnyBay or NVMe
Maximum
12 × 2.5" or 16 × E3.S 1T · up to 16 NVMe on direct links
3.5-inch bays
Not supported
Boot
2 × M.2 — internal, or front or rear hot-swap
Controllers
Onboard NVMe with Intel VROC · RAID 545 and 940 (Tri-Mode) · RAID 960W-32i · 440-16i HBA
Onboard SATA
None
Expansion & networking
PCIe slots
Up to 3 × PCIe 5.0 at the rear (1 FH + 2 LP, or 2 FH)
OCP
2 × OCP 3.0 SFF, PCIe 5.0 x8 or x16
Internal
CFF RAID adapter or HBA bay (2.5-inch layouts)
Serial
Optional DB-9 COM port, installed in a slot
Accelerators
GPU envelope
Up to 3 × single-wide, up to 75 W each
Listed GPU
NVIDIA L4 24 GB (slots 1–3)
Power
Supplies
Up to two hot-swap; identical when paired
Titanium AC
800, 1300 and 2000 W
Platinum AC
800 and 1300 W
Other
1300 W HVAC/HVDC · 1300 W −48 V DC
Ports & video
Front
External diagnostics port · optional 2 × USB 3 (one for XCC) and Mini DisplayPort (not with E3.S)
Rear
2 × USB 3 (5 Gb/s) · VGA · 1GbE RJ-45 XCC port · optional DB-9
Internal
Optional USB 3 (5 Gb/s) port
Video
16 MB in XCC3 · up to 1920 × 1200 at 60 Hz
Environment & warranty
ASHRAE
Class A2 in most configurations; A3, A4 or H1 depending on configuration
Operating temperature
10–35 °C (A2)
Maximum altitude
3,050 m
Warranty
1 or 3 years by machine type · customer-replaceable units and onsite, 9 × 5 next business day
12 — FAQ
SR630 V4 questions, answered from the documentation
What is the maximum memory of the Lenovo ThinkSystem SR630 V4?
With two P-core processors and 256 GB 3DS RDIMMs in all 32 slots, the SR630 V4 reaches 8 TB. E-core processors cannot use 3DS modules, so their ceiling is 4 TB with 32 × 128 GB RDIMMs. The water-cooled 7DK1 model is limited to 16 DIMMs.
Which processors does the SR630 V4 support?
Lenovo lists 34: 27 Xeon 6 P-core parts from 8 to 86 cores, and seven Xeon 6700E E-core parts from 64 to 144 cores. The 6787P is the top P-core SKU, while the 6766E and 6780E share the 144-core maximum. Seven of the 34 are single-socket only.
How many drives does the SR630 V4 hold?
The 2.5-inch chassis tops out at 12 drives, 10 of them at the front and 2 behind; the E3.S front instead takes sixteen 1T, eight 2T, or eight 1T with four 2T. Two M.2 boot drives can be added, but there are no 3.5-inch bays. Each NVMe drive, up to 12 in 2.5-inch form or 16 in E3.S, gets a direct PCIe connection.
How many GPUs can the SR630 V4 take?
Three single-wide cards, one per rear slot, with a 75 W ceiling per card; the NVIDIA L4 is the only GPU Lenovo lists. They need Performance fans and are not supported with Compute Complex water cooling or the Neptune Air module. For double-wide cards, the 2U SR650 V4 takes two.
How many PCIe slots does the SR630 V4 have?
Up to three PCIe 5.0 slots at the rear — one full-height and two low-profile, or two full-height rated at 150 W — plus two OCP 3.0 slots. Slot 3 needs the second processor, and choosing rear drive bays leaves only slot 1.
Should I choose E-core or P-core processors for the SR630 V4?
E-cores give more cores per socket, up to 144 with one thread each, for highly parallel scale-out work, but they take RDIMMs only, lack AMX and have a shorter OS list. P-cores add Hyper-Threading, AMX, MRDIMM, 3DS and CXL memory, and support ESXi 8.0 U3 and 9.0 as well as 9.1.
What power supplies are available for the SR630 V4?
Lenovo offers ten, spanning 800 W to 2000 W: Titanium or Platinum AC models in CRPS and CRPS Premium versions, and 1300 W units for HVAC/HVDC or −48 V DC. Low-line 115 V input works with the 800 W and 1300 W models, while the 2000 W model needs 230 V.
How big and heavy is the SR630 V4?
A 2.5-inch-bay SR630 V4 is 440 mm wide, 43 mm high and 788 mm deep and weighs up to 18.27 kg; E3.S versions are 845 mm deep and up to 19.6 kg. Across the EIA flanges it measures 482 mm.
What changed from the SR630 V3 to the SR630 V4?
Lenovo’s table lists Xeon 6 P-cores of up to 86 cores plus new E-core options of up to 144, DDR5 at 6400 MHz instead of 5600 MHz, E3.S bays in place of E1.S, all three rear slots at PCIe 5.0, a second OCP slot, hot-swap M.2 and XClarity Controller 3. It drops the 4 × 3.5-inch option and onboard SATA.
Is the Lenovo ThinkSystem SR630 V4 end of life?
No. The Lenovo Press guide (revised 8 September 2026) still presents orderable CTO base models and names no end-of-service date. Lenovo ties support to the warranty or service agreement on each machine; our end-of-life checker adds published dates as they appear.
Sources & verification
Where these figures come from
Lenovo ThinkSystem SR630 V4 Server Product Guide (September 8, 2026 (created or updated)) — Standard specifications (Table 3), SR630 V4 vs SR630 V3 (Table 2), processors (Tables 15–19), Neptune cooling (Tables 20–22), memory (Tables 24–26), backplanes and storage configs (Tables 29–33), slots (Tables 59–60), GPUs (Table 69), fans (Table 72), power (Table 73), rails (Table 90), dimensions (Table 93), operating environment, security and OS support.
Specifications are extracted from Lenovo’s published documents and independently re-checked line by line. Configurations are quote-based; availability and exact options are confirmed at quotation. Last reviewed 2026-09-11.
