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Nansar
1 Copper

New RAM is installed but not being used

I installed 4 extra GB of RAM (this computer had 2 1GB cards and one 2GB card, and I replaced the 1 GB's with 2GB's, being careful to use DDR2 and Dell products).  The system recognizes it has 8GB of RAM, but says only 2.99 GB is usable, same as when we had the 4GB of RAM.  Any suggestions for how I can get the Dell OptiPlex 755 running Windows 7 to use the extra RAM?

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2 Replies
Dan-H
3 Zinc

RE: New RAM is installed but not being used

which versin of windows 7?

32 bit or 64 bit?

I'm guessing 32 bit.

You'll need to upgrade to a 64 bit OS to get more than 4GB of RAM.

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Nansar
1 Copper

RE: New RAM is installed but not being used

Yep, you're right.  I'm now upgrading to Windows 10 with 64-bit OS.  Thanks for the help!

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