Most of card are but you need to specify which board and card including model names.
Yes sli and crossfire.
yes Ge force 6200 is compatible
yes
SImple use Any WLAN card and install it on asus motherboard.
yes it can be played with ease if you put a good graphics card like nvidia 8500 gt/gtx
I have Intel E2200 Dual core and gigabyte motherboard and gpu it's the best configuration ever and scored higher on 3d mark than original Nvidia config with msi motherboard or asus.
No, you must buy an NVIDIA GeForce 8400gs card.
yes, but Aero may or may not be supported if your card doesn't have WDDM v.1.
The short answer, is yes the graphics card is compatible with that motherboard / CPU configuration. Hope this helps be safe
if you have a open pci slot yes
yes as long as you get the agp versions of the cards....you board has 8x agp so you must buy the agp versions
Yes. The ASUS K8U-X has four PCI slots.