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R9 290 Tri-X OC Low GPU usage when enable vsync

post #1 of 10
Thread Starter 
Hi. When enable vsync, gpu usage drops from 90%+ to 50-70-80. Is this normal? Perhaps my cpu bottleneck video card? Thanks.

And when vsync enabled, in some areas fps is 80-90. When disable vsync, fps increased to 90-100 in same areas.

p.p this is in battlefield 4. AMD driver is 14.4 beta.

p.p2 cpu usage during playing is 50-55%.
Edited by luckyboy - 4/15/14 at 1:37pm
post #2 of 10
Yes, it is fine for GPU usage to drop when using V-sync, because the cards don't need to do as much work since the fps will never go higher than your refresh rate.

As a side note, it's common to see bad fps in Battlefield 4 with Vsync. It's just a bug in the game that's existed since release date.

In other words, there's nothing wrong with your system. I suggest disabling Vysnc for BF4 unless you don't mind the fps drops.

Hope this helps.
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post #3 of 10
Thread Starter 
Quote:
Originally Posted by BradleyW View Post

Yes, it is fine for GPU usage to drop when using V-sync, because the cards don't need to do as much work since the fps will never go higher than your refresh rate.

But refresh rate on my monitor is 120hz. For example with vsync OFF fps is 120, with vsync ON - 100. Why they drop, when my monitor is 120hz?

For monitoring, using rtss 6.0.0.6228 beta 4 and hwinfo64. Now i playing with vsync ON and high settings

gpu.png

cpu usage 30-50%, gpu usage - 70-95%.

Thanks for the quick response.
Edited by luckyboy - 4/15/14 at 2:50pm
post #4 of 10
If you are still talking about Battlefield 4, then I've already explained that the game has Vsync issues. All you can do is ensure 120Hz is set in the video options next to your refresh rate and put up with the broken Vsync within BF4, or you can just play the game without Vsync. Like I said, these issues existed from the first day of release in BF4.
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post #5 of 10
This is normal, happens with my 7970 also.
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post #6 of 10
14.3 was supposed to fix the vsync issue in bf4 I thought?
 
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post #7 of 10
I haven't read the 14.3 nor the 14.4 changelogs. But it might simply be a problem with BF4 itself.
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post #8 of 10
Quote:
Originally Posted by 06yfz450ridr View Post

14.3 was supposed to fix the vsync issue in bf4 I thought?
It fixed a different Vsync issue. Something to do with stuttering and audio issues. Not the fps reduction.
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post #9 of 10
Thread Starter 
I played today without vsync. More comfortable, when fps is 120+. And gpu usage is 90%+, cpu 50% max. Thanks for the explanations thumb.gif

screen
Edited by luckyboy - 4/16/14 at 9:58am
post #10 of 10
You are welcome+
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