2 cards on a mobo...??

MAY BE my question sounds a little bit stupid !!! but...

is it possible to have 2 different vga cards on a mobo (one high-end and another one low-end) AND use each one WHEN I NEED IT?? (may be... unplug the other card's power cable from motherboard??!! )

or i HAVE TO remove the one that i dont need??

you might find a driver or third party utility program that would let you switch between cards. but simply unplugging the power cables will probably keep your computer from booting up. as a general rule of thumb its not a great idea to mix n match video cards as you performance would most likely be limited to the lesser of the two.

however intel and amd have both put out motherboards (780G or 790G for amd, i don't remember the chipset name for intel) with built in graphics that can handle everyday usage and dvd playing and that can utilize a video card (and put them in xfire or sli).