My completed rig.

[iBeInspire]

Originally Posted by remember300

oh right do you think i could use a 1gb and a 2gb version of the same card in sli

You can, but both will use only 1gb each - Remember, that still means you'll only have 1gb useable in game since both GPUs need to have the same vRam information

[remember300]

ah so id have to get another 2gb card then to notice a performance increase

[iBeInspire]

Originally Posted by remember300

ah so id have to get another 2gb card then to notice a performance increase

Not necessarily, SLI'ing them would still give you a boost, but your current card will basically drop to a 1gb - @1080p most of the time even with that you'd be ok, but with high levels of AA and anything above 1080p, you definitely want more than 1gb.
If your sure you wanna SLI, should try and find a 2gb model, that way your card's extra vram wont go to waste

[remember300]

or should i just wait for a nvidia 7xx or pos get a 670 or 680 i run at 1920x1080 i run crysis 2 at max and hit upto 80fps but then drop to around 30 when it gets intensive i also want to run crysis 3, i need the excess ram for skyrim and soon to be multi monitor along with my 3d modeling software is a little power hungry

[iBeInspire]

Originally Posted by remember300

or should i just wait for a nvidia 7xx or pos get a 670 or 680 i run at 1920x1080 i run crysis 2 at max and hit upto 80fps but then drop to around 30 when it gets intensive i also want to run crysis 3, i need the excess ram for skyrim and soon to be multi monitor along with my 3d modeling software is a little power hungry

I'd wait (and AM Waiting :P) for the next gen cards
What you've got right now is very decent, and should last you till the new cards come out...
All depends on your financial situation TBH, If you've got the money - why not shell out on a 680 :P

[iBeInspire]

And now we should probably stop thread jacking before some admins see *Hides* :P

[remember300]

ah thats true sorry, His rig just inspired me