SLI GTX 550Ti and 470?

[badoosh]

I have a friend that has an issue with running Battlefield 3 in SLI with his GTX 550Ti's and the GTX 470 for PhysX. The 550's run perfect but the 470 doesn't run it just sits like its not being used, how do we fix this?

The 550's are set to SLI and the 470 is set to dedicated physx.

 

[JackNaylorPE]

I wasn't aware that BF3 was PhysX title.

http://www.geforce.com/Hardware/Technologies/PhysX/games

 

[mightymaxio]

Bf3 isnt a physx title. It doesnt run physx would have been better off using 2 470's in sli because you get much higher frames than 2 550s.

 

[badoosh]

That's what I figured since the game has no options to enable Nvidia PhysX. He is going to go with just two GTX 560Ti's in SLI since he can't get water blocks for the 550's...thanks for the help!