Originally Posted by rombat
Rollo, did you use a sli bridge on your GTS450 or just made it a dedicated PhysX card? I was wondering about this if you can sli 400 cards and would it slow a 580 gtx down, but I guess you can run the GTS450 along with it just for a dedicated PhysX card just fine.
I just made it a PhysX card with the CP setting. (haven't heard of people using the bridge TBH- but you can't SLi this card with anything but another 580)
I haven't tested it with/without the 450, but I'll give it a try and post my results. I'm thinking the 450 adds significantly.