Question about Sony VAIO VGN-NR220E/S Notebook PC

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Memory upgrade not recognizing all of the memory

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Your mothermoard may limit the amount of memory you can install. Even if the chips physically fit into the slots, your hardware may not be able to support it. If you have a 32-bit operating system (and if you don't know, it is very safe to assume that you do, especially on that computer) you will not benefit from over 3GB anyway.
If the amount of RAM that you are "short" is realatively small (usually 256MB or under), it may also be that that RAM is being taken up by your integrated graphics card.
Basically, if it is not recognized, you probably wouldn't notice a performance difference anyway and you should have bought less memory (sorry to tell you this).
If you are a moderate-to-advanced-level computer user, you may be interested in this article about Physical Address Extension (PAE) and enabling it to increase your computer's ability to use 4GB or more of memory.
http://www.microsoft.com/whdc/system/platform/server/PAE/PAEdrv.mspx

Posted on Jan 26, 2009

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