I've been looking at getting a new graphis card and was wondering about non-branded OEM graphics cards and whether they are as good as branded ones. I've been looking at the GeForce 8800GT 512mb and there are several OEM cards that are quite cheap. are there disadvantages to these OEM ones that aren't made by a specific manufacturer? I've been looking at XFX, Asustek and Gigabyte but they are all more expensive than these OEM ones. Any advice would be greatly appreciated.