VRAM Usage - 6970 (2 GB) vs. GTX 580 (1,5 GB) vs. GTX 580 (3 GB)

[jimbop]

I think the game is GPU-limited. I am getting playable framerate with settings low enough and some tweaks. See this thread, post #11.

[madrebel]

Originally Posted by jimbop

I think the game is GPU-limited. I am getting playable framerate with settings low enough and some tweaks. See this thread, post #11.

my tests suggest otherwise




note the GPU% in the upper right. sitting at half utilization suggests the gpu isn't being fed fast enough. this would explain why luthier says the multicore improvements offer a large boost to performance.

[jimbop]

Originally Posted by madrebel

my tests suggest otherwise

...

note the GPU% in the upper right. sitting at half utilization suggests the gpu isn't being fed fast enough. this would explain why luthier says the multicore improvements offer a large boost to performance.

Apologies - I have just checked and my GPU usage drops from 99% to ~50% in low flight over London, presumably as the CPU struggles to deal with all the buildings. Bring on the patch!

[madrebel]

exactly. my guess is sound, IO/object handling, network, physics, etc are all going to be run on one core while the raw (pre)rendering and scene setup will be handled by another core.

this should both increase raw fps and decrease microstutters as one core is likely going to manage all the loading to from ram/disk while the other just churns out frames.

im actually a bit more optimistic after this round of testing. if the multicore patch does what it should do then IMO the game will be running pretty darn fantastically especially since this patch will likely follow the improved buildings patch.

i remain vigilantly skeptical until the patches are in and things improve greatly though.

[Armatian]

It surely has to do with the dreaded draw calls, amd guy talked about it days ago, crappy console hardware can easily outdo the fastest gpu on the market, due to api overhead.

"
On consoles, you can draw maybe 10,000 or 20,000 chunks of geometry in a frame, and you can do that at 30-60fps. On a PC, you can't typically draw more than 2-3,000 without getting into trouble with performance, and that's quite surprising - the PC can actually show you only a tenth of the performance if you need a separate batch for each draw call.

"

link: http://www.bit-tech.net/hardware/gra...l-to-directx/1

I think that is pretty consistent, gpu usage doesn't reveal exactly which part of the gpu isn't being used, but i bet that a lot of overhead without actual rendering is part of the issue.
Of course i'm not trying to imply that i exactly know what is going on with this particular engine, but i think we all agree that the newest hardware should manage much more on CoD, so let see if developers manage to tame the beast and make the gpu spit some pixels.

[jimbop]

Originally Posted by Armatian

It surely has to do with the dreaded draw calls, amd guy talked about it days ago, crappy console hardware can easily outdo the fastest gpu on the market, due to api overhead.

"
On consoles, you can draw maybe 10,000 or 20,000 chunks of geometry in a frame, and you can do that at 30-60fps. On a PC, you can't typically draw more than 2-3,000 without getting into trouble with performance, and that's quite surprising - the PC can actually show you only a tenth of the performance if you need a separate batch for each draw call.

"

link: http://www.bit-tech.net/hardware/gra...l-to-directx/1

I think that is pretty consistent, gpu usage doesn't reveal exactly which part of the gpu isn't being used, but i bet that a lot of overhead without actual rendering is part of the issue.
Of course i'm not trying to imply that i exactly know what is going on with this particular engine, but i think we all agree that the newest hardware should manage much more on CoD, so let see if developers manage to tame the beast and make the gpu spit some pixels.

thanks, interesting

[nigelmcelwee]

Originally Posted by jimbop

Apologies - I have just checked and my GPU usage drops from 99% to ~50% in low flight over London, presumably as the CPU struggles to deal with all the buildings. Bring on the patch!

Yeah but the GPU should not be goign at 99 percent the whole time. I have a GTX 580 GPU and it stays pegged at 99 percent the WHOLE time the game is running and it has almost fried my card several times with temps close to 100 degrees celcius.