I have a low budget and i want to upgrade my rig to 64 but on low budget. I have 9600xt and i wont sell this card to get an PCI-E card because im on low budget. That i wont upgrade to nForce 4. I have 2 alternatives : 1. Upgrade to nForce 3 250 GB chipset on cheap motherboard, use Athlon 3000+ socket 754, use one piece of 512MB DDR PC3200 cl2. 2. Upgrade to nForce 3 Ultra chipset on expensive motherboard, use Athlon 3000+ socket 939, use two piece of 256MB DDR PC3200 cl2 on two chanel. The difference on price is high enough and i dont want sell my gfx card because its make price more more expensive. Because that i use AGP 8X motherboard. Help me. Are these two alternative have big difference on performance? I see a benchmark at tomshardware and difference on game quite same but on memory benchmark like SiSoft Sandra the difference is big. What does memory bandwith effect on game? Its make loading faster? Or make game runs smoother (like when im playing doom3 and when opening the door or shoot some monster the sound and the image is freezing and my harddrive is working like loading some texture or sound). Help me, sorry for my bad english.