RAM Problem

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Dmonik

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I purchased a PNY optima memory 256 mb pc2700 ram. I run a Intel Pentium 4 2.80 Ghz 2 cpu (each). My problem is that when my regular ram chip (512mb) runs perfectly and when i add my 256 mb ram chip in the computer will not say anything about new hardware. Plus on Dxdiag and System info it doesnt recognize the chip it only says 512....anyone know what the prob is? When i just run one ram at a time it will show but if i run both of them at the same time it will only show the 512.
 
You must have the same RAM when using DDR.

Channel #1 = 512 x 2 = 1GB
You can't mix two different types in one channel
You must do it like this:
C #1 = 512 x 2 = 1GB
C #2 = 256 x 2 = 512MB
 
No thats not true you can have two different brands. I used to have Geil and Samsung running at the same time. One was 512mb and the other was 256mb.
 
How ? I am not sure but they dont have to be the same. Is the 512mb RAM stick PC2700 also ?
 
try checking at your rams speed... check if both of them are the same as the other.... if you have three slots.... try leaving an open space between them...
 
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