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I have some Buffered, ECC and Registered sticks here.

They're all "1GB 2Rx8 PC2-3200R-333" sticks (a few are 1Rx4 btw), but some of them have different strings following the "333" bit.

  • One stick says "1GB 2Rx8 PC2-3200R-333-10-B1" Another says
  • "1GB 2Rx8 PC2-3200R-333-11-H0" And another set (of 20)
  • sticks says "1GB 1Rx4 PC2-3200R-333-12"

When I put these into my computer the system reported a memory mismatch error, so I'd like to know what's compatible with what.


share|improve this question
What motherboard do you have? – David Schwartz Nov 14 '11 at 19:23
It's a set of blade Dell servers - I recently purchased a shedload of compatible RAM from a computer disposal firm, but clearly some RAM is more compatible than others. – Dai Nov 15 '11 at 15:51
Only the set of 20 is compatible with one another. – Ramhound Nov 15 '11 at 16:43

Your question is a bit contradictory when you say they are all 2Rx8 modules but then you go on to say that some are 1Rx4. Assuming that is not a typo, you've got DRAM ranking issues and you need to RTFM for your motherboard to determine what combinations of memory you can run.

share|improve this answer
Sorry, yes. All but a few of the sticks are 2Rx8, but there are a few 1Rx4. – Dai Nov 15 '11 at 15:45
The answer is the same, read the manual to determine what sticks you can use, you should not be mixing and matching. – Ramhound Nov 15 '11 at 16:43

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