LENOVO | THINKSYSTEM | THINKEDGE | RAM UPGRADE

Server memory for Lenovo ThinkSystem and ThinkEdge — 119 models covered, matched by server or by Lenovo part number.

ThinkSystem SR-series rack servers, ST-series towers, and the SR650a / SR680a / SR780a GPU and AI platforms take registered ECC RDIMM — 98 of the listings here. ThinkEdge SE-series edge and inferencing nodes and the entry ST boards take ECC UDIMM or SODIMM.

DDR5 leads at 74 of 114, running 4800 through 6400MHz, with DDR4 held for the ThinkSystem V2 and earlier fleets still in service. Densities from 8GB to 256GB per module.

Lenovo publishes an option part number for every module — 4X77A93525, 4X77B00032 and so on — and it encodes density, rank and speed together. If you have one, search this page by it. If you have the server model and generation instead, use Shop by System Model. Either way send it to us and we'll confirm before you order.

For legacy IBM System x hardware, see IBM & Lenovo System x Memory Cross-Reference.

Lifetime warranty on every module. Purchase orders, net terms and volume pricing for business, government and education buyers.