Lenovo ThinkSystem SR645 V3
The ThinkSystem SR645 V3 is Lenovo's dense 1U dual-socket AMD server engineered for AMD EPYC 9004 (Genoa/Bergamo) and 9005 (Turin) processors with up to 160 cores per socket. Purpose-built for maximum core density per rack unit, it pairs high-bandwidth DDR5 memory with native PCIe Gen5 architecture and up to 12 direct-attach NVMe Gen5 or 16 EDSFF E3.S solid-state drives. It addresses dense hyperconverged nodes, cloud virtualization, high-throughput container clusters, and analytics engines. In the secondary market, buyers should confirm that performance copper heatsinks or closed-loop liquid assist heatsinks are fitted for processors exceeding 300W TDP, inspect dual 1800W+ power supplies, and check XCC2 licensing.
Also written as: ThinkSystem SR645 V3, SR645V3, 7D9C, 7D9D
Specifications
| Brand | Lenovo |
|---|---|
| Family | ThinkSystem SR |
| Form factor | 1U rack |
| Released | Nov 2022 |
| Cpu sockets | 2 |
| Cpu platform | Dual AMD EPYC 9004 Series (Genoa/Bergamo) and 9005 Series (Turin) processors up to 160 cores per socket and 400W TDP |
| Memory slots | 24 |
| Memory type | DDR5-4800 / DDR5-5200 / DDR5-6000 RDIMM / 3DS RDIMM |
| Memory max (GB) | 6,144 |
| Drive bays | Up to 12x 2.5-inch SFF hot-swap bays (supporting up to 12 direct NVMe PCIe Gen5 SSDs), 4x 3.5-inch LFF bays, or 16x EDSFF E3.S bays |
| Pcie slots | Up to 4 PCIe Gen5 slots plus 2 OCP 3.0 slots |
| Network onboard | Dual OCP 3.0 Gen5 slots plus dedicated 1GbE XClarity management port |
| Power supply | Dual redundant 750W / 1100W / 1800W / 2400W AC 80 PLUS Titanium or Platinum PSUs |
Generations
- Previous generation: Lenovo ThinkSystem SR645
Reference prices (last 14 days, updated 2026-10-27)
New: USD 6,800 (1 sighting, Oct 2026)
Used: USD 4,500 (1 sighting, Oct 2026)
All sightings
| Seller | Condition | Price | Note | Seen |
|---|---|---|---|---|
| cdw.com | new | USD 6,800 | 1x AMD EPYC 9124, 32GB DDR5, 8-bay SFF chassis, 1100W PSU | 2026-10-27 |
| ebay.com | used | USD 4,500 | 2x AMD EPYC 9354 32-core, 128GB DDR5, 8x NVMe bays, dual 1800W PSUs | 2026-10-27 |
Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.
Compatible parts
Memory
- 4X77A77495 ThinkSystem 32GB TruDDR5 4800MHz (1Rx4 1.1V) RDIMM
- 4X77A77496 ThinkSystem 64GB TruDDR5 4800MHz (2Rx4 1.1V) RDIMM
- 4X77A81435 Lenovo ThinkSystem 32GB TruDDR5 5600MHz (1Rx4) RDIMM
- 4X77A81436 Lenovo ThinkSystem 64GB TruDDR5 5600MHz (2Rx4) RDIMM
Network adapters
- 4XC7A08238 ThinkSystem Broadcom 57414 10/25GbE SFP28 2-Port PCIe Ethernet Adapter
- 4XC7A08295 ThinkSystem Intel E810-DA2 10/25GbE SFP28 2-Port PCIe Ethernet Adapter
SSDs
- 4XB7A17128 ThinkSystem 2.5" S4620 3.84TB Mixed Use SATA 6Gb HS SSD
Equivalent models from other brands
- Dell Poweredge R6625
- HPE Proliant DL365 Gen11
Buying a used SR645 V3: what to check
Verify processor heatsink ratings for high-wattage AMD EPYC processors (360W-400W CPUs require high-performance thermal solutions), inspect PCIe Gen5 riser cards and cabling, check XClarity Controller 2 license level, and confirm dual high-wattage power supplies are present.
FAQ
What processors are compatible with the SR645 V3?
It supports AMD EPYC 9004 Series and 9005 Series processors up to 160 cores and 400W TDP per socket.
How many DDR5 memory slots are in the 1U SR645 V3?
The system features 24 DDR5 DIMM slots, supporting up to 6TB of memory at speeds up to 5200 or 6000 MT/s.
Does the SR645 V3 support PCIe Gen5?
Yes, all expansion slots and NVMe drive pathways operate at native PCIe Gen5 speeds.
Buying or selling SR645 V3?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Lenovo ThinkSystem SR645 V3 Server Product Guide, checked 2026-10-27