Headshot, that was a fluke driver. ATI systems aren't supposed to take nvidia's physx candy

it won't really give you headaches, but it'll still be a hassle to hack the drivers, and there could be complications I guess... either way, you still have to have the extra 8800gt. The 470 has everything on one pcb, only 2 slots instead of your 3. Now imagine combining the heat output of your primary card and that 8800gt's heat, would it be more than a 470? How about power consumption? adds up :)
Arinoth, that's an interesting find I never know that a i7 could handle physx. I have an i7 3.8ghz, I haven't tried running physx on it... I always had the impression that physx just wasn't efficient on regular cpu's