Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I don't quite understand the differences between the two besides the obvious price differences. What does each offer over the other?

share|improve this question
up vote 5 down vote accepted

Dell has a nice forum article about the differences. RDIMM is REGISTERED memory and UDIMM is UNREGISTERED memory. This means a few things, UDIMM is limited to two DIMMs per memory channel and UDIMMs 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.

share|improve this answer

Take a look at:

HP DL160 G6 memory PC3-10600R vs PC3-10600E

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.