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Borderlands 2 PhysX can be forced to run on the CPU

I believe they only tested an early level single player.

A lot of people are reporting that further in to the game they are running below 30fps when trying to run high physx on amd.
 
The PhysX effects are pretty cool - I like them :)

Have to see if some AMD users with different set-up's try it and tell us how they get on.
 
imginy said:
I believe they only tested an early level single player.

A lot of people are reporting that further in to the game they are running below 30fps when trying to run high physx on amd.
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Sometimes I wonder what can't techspot try to do their bench under multiplayer gameplay environment...it's not the first time they did this on games that are most played on multiplayer rather than singleplayer (their BF3 review came to mind).
 
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I am running a 920 i7 at 3.8GHz and was initially able to run physx on high with an amd card, but there are some areas with tons of gas/liquid where it becomes unplayable. Game requires restarting when the physx level is changed so its not something you can just turn down when things start to get slow :( I would advise setting it to medium if you don't have a nvidia card to do the work.

I didn't need to edit the config files, I am running 2x 5850 in crossfire and the physx options were available to change via the ingame graphics options.
 
Kotu said:
I am running a 920 i7 at 3.8GHz and was initially able to run physx on high with an amd card, but there are some areas with tons of gas/liquid where it becomes unplayable. Game requires restarting when the physx level is changed so its not something you can just turn down when things start to get slow :( I would advise setting it to medium if you don't have a nvidia card to do the work.

I didn't need to edit the config files, I am running 2x 5850 in crossfire and the physx options were available to change via the ingame graphics options.
Click to expand...

I think the point was changing the setting to 2 in the ini file makes it run from your CPU instead. I have a 6950 and it lets me change the physx to high without editing anything but it runs on the GPU and stutters like mad if I set it to high.
 
Fluid dynamics in the API are not designed to be run on the CPU and will produce massive slowdowns and/or unexpected results when forced to do so (these effects are normally disabled in the CPU based version of PhysX). Borderlands 2 makes quite a bit of use of volumetric/liquid based physics effects.
 
Before Nvidia got hold of it, Physx ran pretty well on CPU. Now its very unoptimised, still uses x87 instructions instead of SSE or 3D Now and its not very good at multi threading. Nvidias excuss is to make it compatible with older CPUs.
 
metalmackey said:
Before Nvidia got hold of it, Physx ran pretty well on CPU. Now its very unoptimised, still uses x87 instructions instead of SSE or 3D Now and its not very good at multi threading. Nvidias excuss is to make it compatible with older CPUs.
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Yeah...lol, SSE / 3D Now.... how old? Pentium 3? get real nvidia :p
 
That video above is hardly testing it on high. Go find an area with lots of enemies and exploding barrels.
 
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