Whats it the significance of haveing more on board ram on a graphics card? Im going for a low end card and was looking at this card at first: XFX GeForce PCX6600 Extreme XXX Edition 256MB DDR2 TV-Out/Dual DVI (PCI-Express) - Retail (PVT43-PUDS7) (GX-058-XF) Then i realised it only had DVI outputs and i have a 21" TRINITRON CRT monitor and its the best monitor iv ever seen picture wise so i dont wanna change it. So rather than use a converter i looked for card that had a VGA OUTPUT. So now im considering this card: Leadtek WinFast PCX6600GT-TDH GeForce PCX6600 GT 128MB DDR3 TV-Out/DVI (PCI-Express) - Retail (GX-045-LT) But i noticed this only had 128mb of onboard ram but its clock speeds are far higher. I also noticed you get a 512mb version of the xfx card and iv got to wandering what advantages does all the extra ram have? Surly it cant make it as fast as a 6600gt ? Either which card would give the highest performace on games like doom 3 and why?