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Solved: Memory difference?

Discussion in 'Hardware' started by mslynn, Aug 24, 2006.

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  1. mslynn

    mslynn Thread Starter

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    Can someone tell me the difference b/w PC2100r and PC2100u?
     
  2. Chris A

    Chris A

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    The "u" stands for unbuffered. The other version will be buffered or registered.

    Buffering helps with systems that have large amounts of memory like on a server. Both should work well on most home systems though I have heard that some AMD CPU's require Buffered ram. not sure on that though.
     
  3. mslynn

    mslynn Thread Starter

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    So, if I'm updating memory the "r" & "u" shouldn't make any difference? The machine is a Presario S4000NX with a Celeron 2.4 GHz. I can put 2 "u" modules in and they read just fine, but if I put the r's in, I get the 3 beeps. (Which I think means it doesn't recognze the first 64k, right?) And I've tried combination of the two and that doesn't work either.
     
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