I selected this vga card over 8600GT 256mb GDDR3.. is it a wise decision ? My main requirement is to play GTA IV @ 1280x800 (low/medium settings) Will i have an advantage having extra memory though it's DDR2 ? Nvidia geforce 8600GT Core Clock (MHz) 500 Shader Clock (MHz) 1000 Memory Clock (MHz) 602 (it says Dual 400MHz RAMDAC in specs, will i get 2x bandwidth ? I see cards like XFX 8600GT ddr2 running @ 1100Mhz) Memory Amount 512mb DDR2 Memory Bandwidth (GB/sec) 6.4 Texture Fill Rate (billion/sec) 3.6 Btw can i run it on a 450w PSU ? Pls help me out guys!