sli possibilty

[polarbear6]

is it required that for sli both the cards have to be identical

like i have a 8800 gt from xfx do i need another 8800 gt from the same xfx or could i buy anything that is cheap for me ??

 

[theAnimal]

It has to be the same card, but not the same brand.

 

[polarbear6]

so like i have a xfx alpha dog so can i go for some cheap brands for anoder 8800 gt
like palit or pov