Using my old 660 for physx

[xl2aNd0m]

I have a i7 3770k, gtx 970, 500w psu (haven't had any issue with it). What PSU should I get so I can use the 660 for physx. Would it be worth it on say witcher 3 where hairworks murders fps?

 

[Joseph DeGarmo]

You should get something like an EVGA 750 G2 PSU. Using the GTX 660 for PhysX improves performance with PhysX effects, but does nothing for hairworks. If you want better performance with hairworks on, then you will need another GTX 970 for SLI.