I have a PB 1,5ghz with 1gb Ram... recently I noticed my PB was going significantly slower. On About this mac/more information I found it only recongnized 512mb... i have unistalled both rams, installed them, change position and tried each one separately in case one of the memories was faulty and the only conclusion is that separtely they work perfectly but when I install both it shows that the LOWER slot is empty. Does anyone have an idea of what could the problem be?? Thanks a lot.
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