nvidia for physx and ati for gfx?

[jamhamm]

anyone here using a geforce card strictly for physx and then an ati card for graphics?

say a 8800 and a 4850?

i wonder how that would play out?

 

[defaultluser]

Supposedly, this was possible in Windows XP, and it may again be possible in Windows 7 (now supports multiple video drivers installed).

Definitely doesn't work in Vista.

 

[rennyf77]

you don't have to install the geforce drivers for the nvidia card right? couldn't you only install the physx standalone drivers along side the catalyst drivers for video?

 

[evilsofa]

you don't have to install the geforce drivers for the nvidia card right? couldn't you only install the physx standalone drivers along side the catalyst drivers for video?

Nope, it's been tried. PhysX needs the nVidia drivers to work.

As defaultluser said, running both ATi and nVidia cards at the same time does work in WinXP, will work in Win7 (but doesn't in the beta) but in Vista it will not work no matter what you do (many, many people have tried many, many different things with no success).

 

[rennyf77]

that's too bad. in no way, shape, or form would buying a physx card make any sense if you can get an 8500gt for practically nothing.

 

[Mad_CatMk2]

Nope, it's been tried. PhysX needs the nVidia drivers to work.

As defaultluser said, running both ATi and nVidia cards at the same time does work in WinXP, will work in Win7 (but doesn't in the beta) but in Vista it will not work no matter what you do (many, many people have tried many, many different things with no success).

How would it work? I do have a 8800GTS 640 lying around...and maybe try using it.

 

[jamhamm]

that's too bad. in no way, shape, or form would buying a physx card make any sense if you can get an 8500gt for practically nothing.

which is exactly what i was thinking... i have all 3 right now [xp, vista, beta 7]

and various red and green cards

i was thinking of using a low dollar 8 series geforce card with say a 4850x2 and seeing what kind of havok i could reek

get it... havok

 

[rennyf77]

which is exactly what i was thinking... i have all 3 right now [xp, vista, beta 7]

and various red and green cards

i was thinking of using a low dollar 8 series geforce card with say a 4850x2 and seeing what kind of havok i could reek

get it... havok

in mirrors edge you see a lot more flutter from the banners an such strewn around the city scape. you also see litter blown around that looks pretty realistic. when you shoot banners they deform convincingly. other than that, they don't do much else for the game. i guess its more about creating immersion. i'd like to see this kind of technology applied to a first person beat em up with true-to-life cloth physics and a greater variety of environmental destruction.

 

[GnomeCop]

I stuck an old 8800GT back into my system in addition to my GTX280 and withit I can run Mirror's Edge at 1920x1200 with 8x AA with PhysX on at very playable frame rates.
Without the 8800GT, with physx on, there would be certain segments of the game where it would slow down to a slideshow at those settings, even with AA turned off.

A friend with a ATI 4870 wanted to try using his old 8800GTS but found out it was a no go with Vista. So for now, this vista behavior works in Nvidia's favor

 

[rennyf77]

Without the 8800GT, with physx on, there would be certain segments of the game where it would slow down to a slideshow at those settings, even with AA turned off.

yikes. i have mirrors edge installed on my i7 gtx 260 rig and i haven't encountered any part of the game too demanding for max settings plus 4x aa 19x12. i also ran it on a friends 3ghz c2d rig with an 8800gtx and i could still apply 2x aa 19x12. i am only 4 stages into the game though.

 

[GnomeCop]

turn on physx and you will see what I am talking about, with the latest 181.22 drivers.
bottom line is that physx will use up some of your GPUs resources, and that will leave less for powering graphics.

usually the scene where you run away from the cops after leaving the mayor's office, and also in the mall where the cops start shooting you when you are chasing the informant are where a lot of glass breaks and physx really tax the system.

I tried every combination of setting without a dedicated physx card, and the only way I got smooth frame rates was to turn physx OFF, until I threw in my old card to use specifically for physx acceleration and take the load off my main card.

 

[rennyf77]

i definitely have physics turned on in driver and in the game, but perhaps the game doesn't employ the 'real' physx features until it detects two video cards in the system.