Why does increasing graphics settings sometimes improve FPS? 7 replies

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FileTrekker Über Admin

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#1 1 year ago

I've noticed, most recently in train simulator, I was having some FPS issues, so I wacked the settings up to max while doing some benchmarking and found that the FPS actually improved....

Had a similar thing with Doom.

Does anyone have any idea what the hell is happening?


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RadioactiveLobster Forum Admin

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#2 1 year ago

Has to do with how resources are being used.

There are very technical explanations but I don't fully understand it so here is my shitty (and possibly wrong) explanation. Basically at the lower settings your GPU isn't being fully utilized fully (sorta a CPU bottleneck) so increasing some settings puts more load on the GPU and lets it run faster. Since these particular settings don't appear to hit the CPU very hard it it's load remains the same and the GPU able to make up some performance.

Basically at lower settings the GPU is waiting on the CPU and bumping up the settings lets it do more while it's waiting on the CPU.

Or all that is wrong. There is probably an article/video that better explains this.


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Lindale Forum Mod

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#3 1 year ago

That is counter-intuitive at best. The lower your settings, the less your computer needs to render, which means it can render more stuff in the same amount of time.

Since I have gotten my computer back up and running, it has not been anywhere near as fast as it once was. To play the same games I was before, I need to run them at lower settings than I had before. If I put the graphics settings in Skyrim to where they were before my computer died, I can barely move at all. Even with the lower settings, I still cannot hit 30fps to save my life.


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Superfluous Curmudgeon VIP Member

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#4 1 year ago

Maybe lowering the settings throws something into a mode that your hardware doesn't support as efficiently? Sort of like going software mode takes the load off the GPU and puts it onto the much less efficient CPU. If you really want to track down the issue you can lower one setting at a time until you find the one(s) that cause(s) the framerate issues.




Lindale Forum Mod

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#5 1 year ago

Which in my case is reflections and shadows. I had to completely disable those.


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Andron Taps Forum Mod

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#6 1 year ago

And anti-aliasing.  Anything above 2x (or sometimes even zero) will gut your FPS like a madman.


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Superfluous Curmudgeon VIP Member

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#7 1 year ago

Lindale, did you ensure all your drivers, especially your graphics drivers are up to date? If all of your hardware is  working correctly, it should not have slowed down - that just doesn't happen to hardware. Does everything show as installed correctly in your device manager? Might also be worth opening your event viewer to see if there are a bunch of warnings/errors in any of the logs. A bunch of errors can sometimes indicate faulty drivers or failing hardware.

My thought experiment was referring more to the performance dive that FileTrekker was getting by lowering  his settings, as that is the more unusual case.




Lindale Forum Mod

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#8 1 year ago

1: I just downloaded whatever driver was on the AMD website. I have no idea how to tell if it is correct. In any case, it was Crimson, and the AMD Catalyst Control Center.

2: Even though this is a fresh Windows install, I have been getting the "AMD driver stopped responding and has recovered."

3: Also, what is Event Viewer?

"Adrian Ţepeş"And anti-aliasing.  Anything above 2x (or sometimes even zero) will gut your FPS like a madman.

To be honest, I don't see any difference with anti-aliasing on or off. They both look exactly the same.


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