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Author Topic: Question about PC graphics bottlenecks  (Read 470 times)
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Teggy
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« on: April 23, 2013, 03:14:49 PM »

If I am running The Witcher 1 and during certain scenes my GPUs (660Ti SLI) are only running at around 50% but I am still not getting 60fps, does this mean that my CPU is a bottleneck?
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TheAtomicKid
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« Reply #1 on: April 24, 2013, 06:12:02 AM »

could be getting microstutter as well. try enabling triple buffering to see if that helps.

could be cpu throttling (easy to check cpu usage)

could be texture swapping slowing the gpu's down if the scenes are complex enough... (you need a tool to measure how much memory is in use on the gpu's over time)...

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PS: For the record I don't remember the witcher needing major amounts of cpu horsepower... what cpu are you using to power those 660ti's ?

PS: Try googling The Witcher SLI problems... I came up with several relevant hits
« Last Edit: April 24, 2013, 06:26:03 AM by TheAtomicKid » Logged
Turtle
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« Reply #2 on: April 24, 2013, 08:33:29 AM »

It may just be that The Witcher 1 engine just isn't all that well optimized.
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Jumangi
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« Reply #3 on: April 24, 2013, 09:09:59 AM »

Yea that game is from 2007 so running sli might be a negative for this game due to incompatibilities. Not a sli user so I don't know if you can toggle it off to test.
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Teggy
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« Reply #4 on: April 24, 2013, 12:35:47 PM »

Quote from: TheAtomicKid on April 24, 2013, 06:12:02 AM

could be getting microstutter as well. try enabling triple buffering to see if that helps.

could be cpu throttling (easy to check cpu usage)

could be texture swapping slowing the gpu's down if the scenes are complex enough... (you need a tool to measure how much memory is in use on the gpu's over time)...

Atomic

PS: For the record I don't remember the witcher needing major amounts of cpu horsepower... what cpu are you using to power those 660ti's ?

PS: Try googling The Witcher SLI problems... I came up with several relevant hits

I have an AMD FX-8320. I'm not really seeing any stuttering or slowdown issues, I just had my display up at the beginning of the game to see how it was performing. During the part where they are walking into the castle, the camera pulls way back so you can see the whole area (hills, etc.) and at that point it dropped to around 50 fps. A couple of other times as well.

Maybe I should have been a little more specific - it's not performing badly in any way, I would just expect I could play it at a solid 60 fps with my setup.
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CeeKay
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« Reply #5 on: April 24, 2013, 02:46:21 PM »

Quote from: Teggy on April 24, 2013, 12:35:47 PM

I would just expect I could play it at a solid 60 fps with my setup.

I agree with Turtle, The first Witcher wasn't very well optimized.  heck, if you dig you can probably find threads where some people couldn't get it to run without crashing every 5 minutes while others had a smooth ride all the way through.  Ultimately it doesn't matter how great the rig is, if the devs do a poor job on their end  there isn't aught your system can do.
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