Metro: Last Light auto enabled PhysX on an AMD system!..

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I treated myself to some Metro: Last Light today after purchasing it during the Steam sales. During the same time i played the intro of the game and got a nice playble framerate after jigging with the settings. My card is a HD6970 for future references.

Today however i loaded up the game after re-downloading the game and all seemed fine until i started shooting in the intro scene and the FPS took a nose dive. From then on it was hooked at around 25 to 19fps no matter what setting i had it at, low, ultra, medium etc. Then at the shooting range i noticed extra shards of metal, wood etc that i had never seen before instantly reminding me this is a PhysX enabled game. Problem is i see no in game option to turn it off unless i have missed it. So how do i disable it manually?

Here are some of my Steam Screenshots so you can see the PhysX or at least what i think i PhysX (mainly because i dont recall all this debris from my last testing)

- http://steamcommunity.com/sharedfiles/filedetails/?id=163594255
- http://steamcommunity.com/sharedfiles/filedetails/?id=163594072
 
Ahh, good ol' PhysX. Removing rudimentary particle effects from games and adding them back in under the PhysX moniker, and slaughtering performance for no good reason.

Is there a game launcher where you can change settings?
 
Nope, but i have just found the PhysX option called "Enabled Advanced PhysX" however it is unchecked meaning PhysX should not be enabled. Strange.
 
There are some physX things that are designed to run on the CPU rather than the GPU so it might be these that are running. Generally these don't hurt the performance too much unless you have a weak CPU but without knowing what your CPU is i cant say if that would be the case
 
Thanks for the help. I couldnt turn it off manually it seems but i hit the "Default options" button that changed all my settings back. Restarted my game and that happily fixed my issue. Getting nice above 60fps now, as a test i also went to re-enable Advanced PhysX to see if i got the same performance repeat from doing so and i did so it looks like my issue is now resolved.

Some day i will enjoy this game with PhysX enabled, but not today!
 
There are some physX things that are designed to run on the CPU rather than the GPU so it might be these that are running. Generally these don't hurt the performance too much unless you have a weak CPU but without knowing what your CPU is i cant say if that would be the case

I have an overclocked i7-3770K. Me and my friend sometimes laugh because i can get better frames per second than his GTX460 in Borderlands 2 with PhysX enabled haha so i know the CPU definitely can handle PhysX but Metro Last Light graphically is another beast compared to Borderlands 2.
 
I treated myself to some Metro: Last Light today after purchasing it during the Steam sales. During the same time i played the intro of the game and got a nice playble framerate after jigging with the settings. My card is a HD6970 for future references.

Today however i loaded up the game after re-downloading the game and all seemed fine until i started shooting in the intro scene and the FPS took a nose dive. From then on it was hooked at around 25 to 19fps no matter what setting i had it at, low, ultra, medium etc. Then at the shooting range i noticed extra shards of metal, wood etc that i had never seen before instantly reminding me this is a PhysX enabled game. Problem is i see no in game option to turn it off unless i have missed it. So how do i disable it manually?

Here are some of my Steam Screenshots so you can see the PhysX or at least what i think i PhysX (mainly because i dont recall all this debris from my last testing)

- http://steamcommunity.com/sharedfiles/filedetails/?id=163594255
- http://steamcommunity.com/sharedfiles/filedetails/?id=163594072

Ah yes, PhysX. Another game I bought from Steam recently installed PhysX too, lord only knows why I have an ATI card?

The game kept randomly crashing, couldn't figure it out until I noticed it had installed PhysX and thought, hang on, thats an nVidia driver....

so I uninstalled PhysX, no more crashing.
 
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Ah yes, PhysX. Another game I bought from Steam recently installed PhysX too, lord only knows why I have an ATI card?

The game kept randomly crashing, couldn't figure it out until I noticed it had installed PhysX and thought, hang on, thats an nVidia driver....

so I uninstalled PhysX, no more crashing.

It runs on CPU also. Not as well as on nVidia hardware, but it does.

Not sure why you are surprised a PhysX enabled title gives you the option to run it, be it GPU or CPU based. :confused:
 
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