How are certain adjustments on the memory clock giving me mixed results performance?

NiBy

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Apr 20, 2017
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gpu: asus strix 1080ti (voltage, power, temp limit max. +100 core)

software: Msi after burner.

benchmark: Heaven (windowed)

+100mhz isn't very aggressive, but it was giving me worse performance and scores when i ran the benchmark.

so i found a spot in that was giving me 132 fps


  • +0 132 fps

    +100 136 fps

    +125 137 fps

    +150 134 fps

    +175 137 fps

    +200 135 fps

    +225 138 fps

    +250 134 fps

    +275 138 fps

    +300 135 fps

    +325 139 fps

    +350 136 fps

    +360 139 fps

    +370 136 fps

    +375 136 fps

    +400 140 fps

    +425 137 fps
why is this mixed result occurring? I understand error correction hit occurs as you get high but this seems really strange.Is all this normal when adjusting memory clock? My gpu temp isn't going above 62c. iv'e linked two images below which may help

https://imgur.com/a/mVdqJXj
 

Chasingfaith

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May 7, 2016
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This is normal behavior and I experienced the same thing. Even though a gpu will generally run faster at higher memory clocks, graphics cards simply don't like certain memory speed values (Adjusting the memory clock even the tiniest amount may cause a perceivable change in performance because of this). Personally I ended up lowering the memory clock on my gpu well below the highest stable oc because I found that this gave me consistently better performance.

Also, increasing the memory clock above a specific point will decrease performance altogether. This happens because errors induced by the oc have to be fixed (taking up gpu resources)
 

NiBy

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i'm too fussed, but i want to get as much performance out as possible. Im just curious as to why this happens as i can't find anything on it. Maybe i have a dodgy card.
 

Chasingfaith

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May 7, 2016
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This is normal behavior and I experienced the same thing. Even though a gpu will generally run faster at higher memory clocks, graphics cards simply don't like certain memory speed values (Adjusting the memory clock even the tiniest amount may cause a perceivable change in performance because of this). Personally I ended up lowering the memory clock on my gpu well below the highest stable oc because I found that this gave me consistently better performance.

Also, increasing the memory clock above a specific point will decrease performance altogether. This happens because errors induced by the oc have to be fixed (taking up gpu resources)
 

NiBy

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Apr 20, 2017
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ok so the most optimal setting would be no error correction, no artifacting and non of this abnormal behaviour?
 

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