Railworks Poor Performance

[cehidal]

Hello,

I definitely think that the perfomance is limited by the cpu (with the actual implementation of RW3). I recently changed my old (but great) nVidia 9600GT for a new MSI GTX560 Ti 2GD5 and, with the same configuration, I won 0 fps. Yes, 0 FPS!!. I have exactly the same fps with the old card that the new one. The only difference is that with the old card I had the GPU at 100% and with the new card I have it 40%. The memory usage is the same.

The only possible conclusion is that the RW3 use primarily CPU.

Regards.

[asfinmja]

The only possible conclusion is that the RW3 use primarily CPU.

Nope, only possible conclusion is that your CPU is limiting performance on your computer.

Link to CPU hierarchy chart for gamers:
Tom's Hardware, Best Gaming CPUs For The Money: March 2012: Gaming CPU Hierarchy Chart

[cehidal]

Nope, only possible conclusion is that your CPU is limiting performance on your computer.

Link to CPU hierarchy chart for gamers:
Tom's Hardware, Best Gaming CPUs For The Money: March 2012: Gaming CPU Hierarchy Chart

Maybe... or maybe not. I don´t think that a core 2 quad Q9300 is limiting performance in my computer too much. It is not an i7, but with the graphics card change AND SAME CPU I have:
50 fps on CoD MW3. All set to maximum settings.
40 fps on BF3. All set to ultra.
50 fps on Batman: Arkham city with DX11 (Teselation normal) and PhysX enabled (normal) with all settings to max.
30 fps on NFS the Run, all settings to max.
...

OK, a simulator game has more computing that an arcade game but 10-15-22 (this last on original routes) fps on RW3 with FXAA?
GPU usage 20%?
All of my 4 CPU cores at about 50%?
PhysX always to CPU, even with a GTX560?
Something in RW3 is wrong. The GPU is poorly used and the CPU is not at 100% (but more used than the GPU).
RW3 uses primarily CPU.

Regards.

[shanyiqua]

50 fps on CoD MW3. All set to maximum settings.
40 fps on BF3. All set to ultra.
50 fps on Batman: Arkham city with DX11 (Teselation normal) and PhysX enabled (normal) with all settings to max.
30 fps on NFS the Run, all settings to max.
...

OK, a simulator game has more computing that an arcade game but 10-15-22 (this last on original routes) fps on RW3 with FXAA?

If TS2012 is a simulator, then those games you wrote are simulators too

[sdark2]

I've been playing around some more and have managed to find an acceptable solution that means Railworks is now playable, to a certain degree.

Ramping up the AA seemed to have a knock-on effect on gpu usage - seems that RW uses the vast majority of graphic processing power to handle anti-aliasing. On my rig, I pushed AA to SSAA2x2 mode to result in 90% gpu usage on one card, in SLI mode, a solid 60% load across both gpu's. All in-game settings are maxed. Now, as you'd expect, frame rates at such graphic quality naturally suffered.

So... starting out with a base clock on my cpu, frame rate was around 8fps on WCML-N, and over-clocking to 802MHz over base (the maximum I can push my cpu before it starts wanting to do a day job at Mickey D's) produced more than double the frame rate to 24fps. This is by no means solid - still lots of stuttering going on but nowhere near as bad as it was. Running the same settings on the S&D route, my frame rate instantly went to solid and continuous 40fps.

I suppose you could argue that AA should be handled by the gpu's but I think the loading, from ~25% to ~90% on one card, is a bit extreme (in comparison to other games with AA on full).

Kr, Steve