Lenovo ThinkSystem 256GB 4Rx4 DDR5-6400 3DS RDIMM TruDDR5 Memory

The Lenovo ThinkSystem 4X77B07422 puts 256GB on a single module. It is a 3DS RDIMM, a stacked-chip design, with a 4Rx4 layout, ECC and a DDR5-6400 data rate. It is listed for the SR645 V3 and SR635 V3.

Modules of this size are for extreme memory footprints: very large virtual machine hosts, in-memory databases and similar jobs. A few of them can take a server to a memory total that would otherwise need many more slots.

Four ranks per module also means population rules matter, since servers cap the number of ranks per channel. Review the platform's guide before planning, and confirm that your configuration can run the module at its rated speed.

The module is offered new or refurbished with a choice of 1 year or 3 years of warranty. No used offer is listed. List 4X77B07422 on your RFQ along with the memory guide limits for your server if you have them.