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128GB DDR5 Server Memory
Key takeaways
- 324 listings match this collection right now.
- 128GB DDR5 modules use 3D-stacked (3DS) die construction to reach that capacity within a standard dual-rank or quad-rank module footprint.
- Fourth-generation Xeon Scalable and EPYC 9004 platforms both qualify 128GB RDIMM, but the maximum number of these higher-rank modules per channel is set by the platform, not the module.
- A 128GB module's higher rank count means it has to match the rank of any other module sharing its channel, since mismatched ranks are not supported by the memory controller.
128GB DDR5 modules reach 1TB per socket on an eight-slot platform and 2TB per socket on sixteen. They cost more per gigabyte than two 64GB modules, so they earn their place where slots, not budget, are the constraint: in-memory databases, virtualisation hosts and analytics nodes.
324 listings in this collection, filtered from Server Memory. The part number and manufacturer are stated on every listing, and the condition wherever the catalogue records one. For quantity, request a volume quote.
How to choose server memory
DDR3, DDR4 and DDR5 modules are keyed differently and do not interchange, so the generation your platform accepts comes first. Registered (RDIMM), load-reduced (LRDIMM) and unbuffered (UDIMM) modules cannot be mixed in one system: add the type already installed, or replace the full bank. Match rank and speed to the existing modules, and read an installed part number from iDRAC or iLO when in doubt.
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