ATI Vidcard + Nvidia Physx Card?

[PinkiesBrain]

Hey I found mostly inconsistend infos in the web about this so maybe you guys know.

I recently was given an ASUS ENGTX 275 for free and I d like to use it for calculating the Physx stuff.
Since I use 3*24" Monitors i have to stick to my ATI 6970 but in some games which heavily use physx (Batman arkhamcity f.e) my system doesnt produce >20 fps. (all maxed)
I wondered if i just buy another board and put the nvidia on it.

I HEARD it works fine... but im not actually sure - so maybe sbdy of you does know more.

[Delphium]

Greets :)

http://widescreengamingforum.com/forum/14358/tweak-nvidia-physx-ati-cards

http://widescreengamingforum.com/forum/forums/multi-monitor-gaming/amd-eyefinity-discussions/19039/ati-graphics-cards-nvidia-card-phy

:searchplease

[PinkiesBrain]

TY very very much

sorry - i used the search - but obviously worn g..
again ty very much