If I purchase two video cards for my PC, do they have to be the exact same video card?

I'm purchasing a computer on cyberpowerpc.com. I have the option of purchasing two video cards. Do they have to be the exact same video card or can I purchase an extra video card that's only 1GB while the other is 2GB.|||As the above answer states -- the 2 cards have to be identical. The brand of the card does not matter.



As for video memory -- yes, Crossfiring or SLi'ing 2 cards with different memory sizes also work, but this actually forces the 2 GB card to only work as a 1 GB card, so you're wasting 1 GB of VRAM by choosing to pair a 2 GB with another card with lesser memory.|||For Crossfire or SLI configurations you need to have the same graphics card. It doesn't have to be from the same company though. For example if you got an EVGA GTX260 and a BFG GTX260, they will work together, but an EVGA GTX260 and an EVGA GTX280 will not work together.|||Im guessing that you are meaning by Graphics cards. You can run 2 cards as long as your motherboard supports it. Should have a SLI or Crossfire technology emblem somewhere or mentions in your motherboard manual.



Those particular motherboards are designed for extreme gaming. The cards for ATi dont have to be exactly the same model, but you would want to have 1gb of the DDR (2,3,5) the same. So, you can run a 4670 and a 4650, but it will only benefit the lower end card and use it for the main one.



NVidia SLI technology has to be exactly the same everything. Ram, Model, and extension. Its really a long answer behind all of this and a little difficult to explain, but ATi Crossfire allows you to stay within certain boundaries of cards (ie. 4600 series, 4700 series, etc.) long as the first 2 numbers match, you should be good.