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[Benchmark3D] Microstutter Case Study: Skyrim - Page 2

post #11 of 61
Quote:
Originally Posted by gbatemper View Post

my 2gb 660 ti stutters like crazy with texture mods frown.gif. Guess 2gb is the bottleneck as it's always maxing out.

The 256-bit memory bus doesn't help out much either, the first graphics card I ever purchased had a 256-bit memory bus, the 7800 GTX.
post #12 of 61
Quote:
Originally Posted by Systemlord View Post

The 256-bit memory bus doesn't help out much either, the first graphics card I ever purchased had a 256-bit memory bus, the 7800 GTX.

You mean 192 bit, only the 670/680 use the 256 bus.

But his stutter should come mostly from the mods and not the card/game combo like AMD users.
Edited by Junkboy - 1/12/13 at 2:02am
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post #13 of 61
Quote:
Originally Posted by Darkpriest667 View Post

considering they said it only affects AMD cards good job proving your 680 is not an AMD card. thumb.gif

I know, i was putting out results if anyone was interested.
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post #14 of 61
Quote:
Originally Posted by Thiefofspades View Post

I know, i was putting out results if anyone was interested.

Some of us appreciate it as it gives a good point of reference @4.4ghz so danke. thumb.gif
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post #15 of 61
Here you go buddies.

Just FYI, this is an A10-5700 at 3.4GHz, Turbo disabled, GPU at 760MHz. DDR3-1866 CL8-10-9-27 2T. 2GB framebuffer.

Settings the benchmark was ran at:



Automatic core affinity



Manual core affinity



So yes, it gets rid of approximately 75% of the stuttering. The rest, I blame to a lack of bandwidth.

It was smoother, despite the overally slightly lower framerates.

For anyone interested, this was done on Ilinalta's Deep, from the entrance to the 2nd room where the Necromancer is looking at the water. Killed all the enemies using the Flame wall skill and Steadfast Ward, and ran multiple times to ensure the most similar cases were made.
Edited by Artikbot - 1/12/13 at 2:43am
   
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post #16 of 61
This makes the issue look even more like the old dual-core problems that plagued many games when multi-core CPUs were new. Very interesting tests and results.

Video drivers are multithreaded and have been for some time. Since this issue seems largely limited to GCN cards and the drivers supposed to extract the most performance from them, and that a big part of the changes in GCN were built around improving the granularity of it's threadiness (yeah, I know that's not a word). Anyway, from my perspective, this is deja vu all over again, but with a GPU or more properly how the GPU and CPU interact on a threading/scheduling level, rather than a CPU timing issue as it was in ~2005.

Hopefully this won't be too difficult to fix in drivers, manually adjusting CPU affinity at a significant frame rate hit is far from an ideal solution.
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post #17 of 61
Fixed title and made a bit of a compromize.
Folks, I have added a tiny url link to the OP instead of the original link due to the filter kicking in.
post #18 of 61
this is interesting stuff

thanks for posting thumb.gif


1 core affinity and it will all be smooth as butter? Which is kind of sad, as that's the settings console games probably get or are more suited too and they usually have a perfectly smooth (albiet lower quality) experience.
post #19 of 61
I think I'm doing something wrong, but here are my results with a stock 7950 and a 4.5 GHz i5-3570k.

All cores:


One core:


These results are at 1440x900 pixels and max settings.
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post #20 of 61
Quote:
Originally Posted by Darkpriest667 View Post

considering they said it only affects AMD cards good job proving your 680 is not an AMD card. thumb.gif

Basically what he did is debunk the entire article as garbage which it is.

Slowing down the game by running on one core does make the game smoother, for AMD. For Nvidia, all it did was reduce the framerate.

A select few here keep desperately trying to pass the buck from AMD to Bethesda on this.

If Nvidia is running Skyrim smooth on one core or four cores, why can't AMD? That is the question and no tech site will provide that answer, only AMD will.

Let's say that indeed the game is the issue. If Nvidia can find a workaround for smoothness, AMD should be able to as well. I keep hearing on OCN how much better AMD's driver team is. Let's see it. My 7970 awaits.
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