Does Video Card Memory affect OS memory? Having 256mb vs 512MB vs .... will affect amount of memory left for OS? If so when does this happen? During Games/graphics intensive or it consumes the memory even if it is idle? Friend has BFG 8800GTS 640MB (not sure). Mobo is EVGA 680I. If he puts 4x1GB sticks, in bios and during post shows as 4G. But inside Vista 32bit shows as 2.8G. He says the video card has consumed rest of the memory. Is this true?