my gpu is not maxing out when it should
- Thread starter yarin1234
- Start date
Solution
photonboy
Titan
- Jun 20, 2006
- 21,567
- 13
- 85,015
Hey,
You almost certainly have a CPU bottleneck any time the GPU is underutilized.
If the GPU is underutilized it's either:
a) CPU bottleneck, or
b) FPS bottleneck (cap set such as VSYNC ON to cap at 60FPS/60Hz monitor)
*When you raised GPU usage by tweaking settings you likely put more load on the GPU relative to the CPU (8xMSAA for example is very GPU intensive).
Every action still uses the CPU so your FPS always drops (if not capped) though it may not be significant or you may not care.
**In general you should set a GOAL (such as Adaptive VSYNC forced per game and getting 60FPS at least 90% of the time) then tweak towards that goal rather than worrying that your GPU is underutilized.
If the GPU is not the bottleneck, the CPU probably is and vice versa. It varies by the game, hardware, and settings in the game.
You almost certainly have a CPU bottleneck any time the GPU is underutilized.
If the GPU is underutilized it's either:
a) CPU bottleneck, or
b) FPS bottleneck (cap set such as VSYNC ON to cap at 60FPS/60Hz monitor)
*When you raised GPU usage by tweaking settings you likely put more load on the GPU relative to the CPU (8xMSAA for example is very GPU intensive).
Every action still uses the CPU so your FPS always drops (if not capped) though it may not be significant or you may not care.
**In general you should set a GOAL (such as Adaptive VSYNC forced per game and getting 60FPS at least 90% of the time) then tweak towards that goal rather than worrying that your GPU is underutilized.
If the GPU is not the bottleneck, the CPU probably is and vice versa. It varies by the game, hardware, and settings in the game.
photonboy
Titan
- Jun 20, 2006
- 21,567
- 13
- 85,015
GTA5:
On my setup (GTX1080 + i7-3770K@4.5GHz) I get occasional drops below 60FPS.
normally not a big deal, but in this game (for me at least) it causes really bad JUDDER any time it drops. I did TWO things:
1) forced on Adaptive VSYNC (so screen tear instead of added judder/stutter)
- NCP-> manage 3d settings-> ..add GTA5-> adaptive VSYNC-> SAVE
and
2) tweaked settings so drops below 60FPS were rare.
- best combo of settings to YOU that maintains 60FPS
(You can alternatively just turn VSYNC OFF but screen tearing would probably be annoying)
On my setup (GTX1080 + i7-3770K@4.5GHz) I get occasional drops below 60FPS.
normally not a big deal, but in this game (for me at least) it causes really bad JUDDER any time it drops. I did TWO things:
1) forced on Adaptive VSYNC (so screen tear instead of added judder/stutter)
- NCP-> manage 3d settings-> ..add GTA5-> adaptive VSYNC-> SAVE
and
2) tweaked settings so drops below 60FPS were rare.
- best combo of settings to YOU that maintains 60FPS
(You can alternatively just turn VSYNC OFF but screen tearing would probably be annoying)
photonboy
Titan
- Jun 20, 2006
- 21,567
- 13
- 85,015
OTHER:
It's fairly easy to tell roughly how much of the GPU is being used and how this affects "bottlenecking" issues.
However the CPU is a different story. You could show 50% usage on a CPU but still have a bottleneck since games vary in how many core/threads they can use. Due to thread jumping you likely won't even see a single core show 100% usage.
Thus we use the GPU load to determine if the CPU is the bottleneck. If the GPU is underutilized it's because it's waiting on the CPU to send it more information (either because the CPU is not fast enough or because of a software cap forcing it to wait such as VSYNC).
It's fairly easy to tell roughly how much of the GPU is being used and how this affects "bottlenecking" issues.
However the CPU is a different story. You could show 50% usage on a CPU but still have a bottleneck since games vary in how many core/threads they can use. Due to thread jumping you likely won't even see a single core show 100% usage.
Thus we use the GPU load to determine if the CPU is the bottleneck. If the GPU is underutilized it's because it's waiting on the CPU to send it more information (either because the CPU is not fast enough or because of a software cap forcing it to wait such as VSYNC).
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