hi my name is robert i am preparing to upgrade my wifes box and im going to put in a Intel core 2 duo 3.6 GHZ 1066fsb 64bit chip the main board supports 64bit instructions can i put in a video card with vddr3 video memory or do i have to stick with vddr2 video memory im also upgrading to win7 64bit from 32bit vista the main board memory is maxed out at 4gb ddr2 the card i got my eye on is Diamond 6570PE31G Radeon HD 6570 Video Card - 1GB, GDDR3, PCI-Express (x16), 1x Dual-Link DVI, 1x HDMI, 1x VGA, DirectX 11, Single-Slot i have a radeon diamond viper 512vddr2 pci-e in it now.