SLI question

I have a 8800GTS 640mb, I want to buy another one to SLI as they are quite cheap second hand.

My card is a winfast and isn't overclocked. I can get an Overclocked BFG card, will they work together I know the different brands should work but what about different speeds?

 

TBH you won't notice much difference going SLI with that card, especially as you just got an i7, i would save the cash and get something like a 5770 or something like that.

But yes, the cards should work at different speeds, if not then either OC your current card, or underclock the BFG card.

 

Yup, it should work. Both cards will run at the slower card's clock and memory speed unless you boost it up. Reasonably sure that if you get a card with more memory, the same kind of mechanic applies.