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RAM detection problems on P2B series boards



 
 
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Old May 16th 05, 04:03 AM
timmy
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On Fri, 13 May 2005 04:51:50 GMT, "Rick" wrote:

I have the PB3-F, fully loaded pci and 3x256mb dimms (DS)(cl222). I
did not notice this same problem until I swapped cpu's to a 133mhz
coppermine from a 100 mhz coppermine. Now the ram registers as cas333
10 instead of 222 8. Setting this manually is no problem and the
system runs fine. But there is an intermintant problem where the
memory may or may not be all counted "AFTER" a cmos change and save.
It's wierd and I will be testing the dimms individually, even though
I'm sure it is something else, possibly something along the lines of
what you have described...
FYI

Assuming your modules are correct (low-density, organized
into two logical banks of 128MB per dimm instead of one
256MB bank), the problem is likely related to voltage. Most
BX board designs, even those with three dimm slots instead
of four, have anemic 3.3v power supplies to these slots.
Many share power between slots, so e.g. you might get one
running with slots 1 and 3 populated but not 1 and 2. Or
with 1 and 2 populated, but not all three. Etc.

Not much you can do other than trial and error.


 




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