DDR4 UDIMM Unbuffered Memory

Key takeaways

  • 1,075 listings match this collection right now.
  • Unbuffered modules have no register or buffer chip between the DRAM and the memory controller, which limits the rank count a channel can carry compared with registered memory.
  • Single-socket Xeon E platforms and workstation-class boards are the primary users of DDR4 UDIMM, since their memory controllers are designed for the lighter electrical load unbuffered modules present.
  • An ECC UDIMM carries the same 72-bit-wide data path as registered ECC memory, so the missing buffer chip does not reduce its error-correction capability, only its rank support.

Unbuffered modules are the workstation and entry-server class of DDR4: no register, so most two-socket servers will not accept them, and they cannot be mixed with registered modules. This collection holds both ECC and non-ECC unbuffered parts; the listing name or specification states which, and an ECC platform needs the ECC part.

1,075 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.