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missing RAM

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3 replies

by nyfitter

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I have installed Two sticks of DDR3 RAM 2G each and the comp. only recognizes 2G ,Why is this happening? The OS is vista and allows up two 4G per slot ,up to 16G.

3 replies

by seanferd

You may need to enable something or change a setting.

Is the RAM properly seated, and in the appropriate slot for a second stick? Is it the right spec for the machine?

by thechas

First of all, I agree that you may have an issue with incompatible RAM on your system.

Post back with the details on your motherboard and the exact RAM you installed and we can see if they are compatible.

You may just need to enter BIOS setup so that the BIOS can recognize and register the new RAM.

Second are you running the 32 or 64 bit version of Vista?

If the 32 bit version, 2GB could be all the RAM you have available. If you have a high end video card and other controller cards installed in your system, the amount of addressable RAM is reduced from the 4GB maximum for a 32 bit OS.

With the 32 bit version of Windows XP, Vista, or Windows 7, the maximum usable RAM is 3.25 GB. That is with a moderate video card and no high resource plug-in cards.

Chas

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