Lenovo ThinkSystem ST45 V3Specifications, configurations & comparisons

64 GB, from two 32 GB ECC UDIMMs — one in each of the processor’s two memory channels. Lenovo lists 16 GB and 32 GB modules rated 5600 MHz and allows one or a matched pair. Its processor table caps the EPYC 4004 series at 5200 MHz, and a note limits the 32 GB module to 5200 MHz with those processors.

One AMD EPYC processor from eight 65 W models: the 4004-series 4124P, 4244P, 4344P and 4464P and the 4005-series 4245P, 4345P, 4465P and 4545P. They range from 4 to 16 cores, and all are fitted at the factory rather than sold as option kits.

Up to four internal drives — three 3.5-inch plus one 2.5-inch SSD, or two 3.5-inch with a slim DVD writer — and two M.2 NVMe drives on the system board. None is hot-swap, and the bays are reached from the side of the chassis. Lenovo quotes 24 TB with three 8 TB HDDs.

Not out of band, according to Lenovo’s guide: the ST45 V3 has no XClarity Controller management processor, and its management features are described as local. Set-up, RAID configuration, OS installation and firmware updates use Lenovo XClarity Provisioning Manager Lite from a USB key. The ST50 V3 is the step up with an XClarity Controller and a dedicated management port.

Two full-height, half-length PCIe 3.0 slots: slot 1 is x16 (75 W) from the processor and slot 3 is x1 (25 W) from the chipset. Lenovo supports no GPU; the rear DisplayPort and HDMI outputs drive local displays at up to 4K and 60 Hz.

One fixed ATX supply — 300 W Gold or 500 W Platinum — picked at the time of order. Lenovo states that it cannot be upgraded and there is no redundant option; only the 500 W unit meets ErP Lot 9.

Lenovo gives 170 mm wide, 376 mm high on its feet and 315 mm deep, and 8.56 kg at most — sized to stand under or beside a desk. Its declared typical sound pressure is 25 dBA idle and 40 dBA operating, though Lenovo’s test configurations include parts the ST45 V3 cannot use.

Lenovo’s comparison keeps the 17-litre chassis, up to four drive positions and 300 W or 500 W fixed supplies for both. In that table the ST50 V3 has Intel Xeon E-2400 or Pentium processors of up to 8 cores (its own guide adds Xeon 6300), four DIMM slots (128 GB), three PCIe slots including a PCIe 5.0 x16, two 1GbE ports, an XClarity Controller and two M.2 SATA drives on a slot adapter. The ST45 V3 answers with AMD EPYC processors of up to 16 cores and two M.2 NVMe sockets on the system board.

Lenovo lists Windows Server 2022 and 2025, RHEL, SUSE and Ubuntu, but not VMware ESXi. Hypervisors such as KVM, Xen and Hyper-V can reach the onboard SATA ports in AHCI mode alone, without RAID, and the onboard network controller has no SR-IOV support.

The product guide gives no end-of-sale or end-of-service date and still lists orderable processors, drives and regional models. Machine type 7DH4 carries a one-year base warranty and 7DH5 three years, with Lenovo service upgrades on top; our end-of-life checker records any date Lenovo publishes.