SLI... no oops its Crossfire

Ok, I built my Computer about 2 years ago and have updated over the years. In the updating I bought a motherboard that crossfires but came with a SLI Bridge. So I figured why not get another GPU and giver hell.

Though I just found out that that doesn't work. So now I have 2x8800GTX and can't use em in SLI.

Now that you know my mistake, which ATI cards would match around the same power of the 2x8800gtx's or 2x8800gts's.

Please know I don't know much about ATI and that why most likely I got a Crossfire mobo without knowing it couldn't SLI.

Thank.

I think the OP has 8800 GTX, not 8800 GT - that is significantly different.

You just bought 8800GTXs? They are pretty old tech now (though they still perform).

You're going to get 2 new GPUs to replace the two that you have that won't work on your board? Wouldn't it be just as cost effective to buy a new motherboard?

I'd say the 4870 would put you about on par with those GPUs