i have a system with 1.5 GB ram and nvidia 8600 GT and windows vista sp2 and windows 7 beta both 32 bit. when i upgraded my ram to 3 GB ( by adding 2 GB ram and Removing the 0.5 GB ram ) i am not able to see the display in my monitor. but the same configuration is working when i connect my VGA adapter to onboard intel 82945G. i am not sure wat is the problem when i connected to nvidia 8600 GT . But i am able to run 2.5 GB ram with my nvidia 8600 GT . Please help me in fixing this issue as i don't want to waste my .5 GB ram .