mixing Rdimm and Udimm

Discussion in 'Hardware Components and Aftermarket Upgrades' started by kevincaus, Mar 21, 2018.

  1. kevincaus

    kevincaus Notebook Geek

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    Is it ok to mix Rdimm and Udimm memory on the same motherboard
    my dell will have 2x8 DDR4 2666 Rdimm, but my online search for extra ram only has
    2x8gb, DDR4, 2666 Udimm.
    close enough match?
    Dell only offer 16gb here in australia vs 32 gb for the same machine in the USA
    (XPS 8930)
    Thanks.
     
  2. kevincaus

    kevincaus Notebook Geek

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    This is what google says:
    RDIMM is REGISTERED memory and UDIMM is UNREGISTERED memory. This means a few things, UDIMM is limited to two DIMMs per memory channel andUDIMMs offer slightly better memory bandwidth for one DIMM per channel. However when using two or three DIMMS per channel you will get better memory bandwidth with RDIMMs.Jul 11, 2011
     

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