which of these 2 video cards is better, I need a card for my system.
Sparkle GeForce 8600 GT 512MB DDR2 SLI Ready PCI Express DVI VGA HDTV Video Card SF-PX86GT512U2-HP in Canada at TigerDirect.ca
or
EVGA GeForce 8600 GT 256MB GDDR3 SLI Ready PCI Express DL Dual DVI HDTV Video Card 256-P2-N751-TR at TigerDirect.com
Sparkle GeForce 8600 GT 512MB DDR2 SLI Ready PCI Express DVI VGA HDTV Video Card SF-PX86GT512U2-HP in Canada at TigerDirect.ca
or
EVGA GeForce 8600 GT 256MB GDDR3 SLI Ready PCI Express DL Dual DVI HDTV Video Card 256-P2-N751-TR at TigerDirect.com