How do I know if my computer can support a graphics card

[rankinrulz]

I am using crossfire ATI radeon 5670's which i know means has a PCI express slot but I don't know about my power supply I know its at least 500W because I can run crossfire, you might be able to tell I'm quite new to this about the biggest thing I have done is upgraded my RAM I am interested in getting the GTX 690 but obviously I don't want to spend the money if I cant run it some additional information that may be required is my motherboard is an Alienware board called the Alienware 04VWF2 and I am using 8 Gigs of RAM and am running an i7 2.66Ghz no overclock. Thanks in advance for any help.

 

[iyzik]

Well yeah kinda all depends on your power supply, you'll need to figure out how many watts you have. It should say right on it.

 

[RamjoTejada]

High end cards need at least 600-800 watts of power for Crossfire systems.