Should be fine. I'm running 4GB on Vista 32-Bit. So in reality I only have 3GB. However, my GTX260's SLI each have 896MB, so I have just under a 1GB of VRAM. Even then, with textures maxed out there tends to be hitching every now and then. Having a quad-core CPU for GTAIV helps as well. -- THIS IS SPENCER. MISSION ACCOMPLISHED - I HAVE JOE. RETURNING TO BASE.