SLI on differnt cards

[Treky123]

Hello, I recently built my first computer (6 months ago) and just yesterday I upgraded from a Asus GTX 550 ti 1GB VRAM, to an EVGA 660 ti overclocked 2GB VRAM, My asus card came with an SLI bridge and I was wondering whether or not i can put these two cards in SLI for a slight performance boost?

 

[COLGeek]

They will not SLI together because they are in different GPU families.

 

[Derza10]

No you can not use them in SLI, you can set the gtx 550 ti as a physx. I don't know if it will really give you any improvment in most games though. Also you would need to make sure you have a good enough PSU to support them both.