Question regarding SLI, exact duplicate required?

[Fritjoff]

Good day,

Forgive my ignorance on the issue, but I am in the dark on this matter regarding SLI. I own a EVGA 660 Ti 3GB. To be exact I have this http://www.newegg.com/Product/Product.aspx?Item=N82E16814130812 .
I am having a tough time trying to fine the exact model, 03G-P4-3663-KR, out there even from Ebay, Amazon and the like. Though, I have found the following model 03G-P4-3661-KR, on Amazon. Or http://www.newegg.com/Product/Product.aspx?Item=N82E16814130812 .

Question being, can I get these two cards to play nicely together in SLI? Would I have to clock down the other card to match the other? Or is not feasible? Any input would be greatly appreciated?

Thanks.

 

[JayTeague]

Exact Same is always perfect, but typically for SLI you can get different model numbers, etc.. as long as:
1. Same RAM Size
2. Same Card type: ie: both 660 Ti
3. Same Clock Speed -- This is desired, if they are different, then it will run at the slowest cards rate

 

[oczdude8]

Yea Jay is right. Basically, as long as you get another (any) 660ti with 3GB of Vram it will work