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  1. #1
    ROG Guru: Yellow Belt Array Sverre PC Specs
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    OC'ing ROG Strix GTX 1080 O8G gaming

    Rampage V Extreme

    I get it to 1968 (GPU) and 10980 (RAM), but the temp on the GPU never exceeds 41C. Why can't I squeeze more out of the card?

    I'm running GPU Tweak II v. 1.2.2.9.

    GPU Boost +70 (1968)
    GPU Voltage +100 (100)
    Memory Clock +970 (10980)

    Max Temp ever recorded with 3DMark Fire Strike and Unigine Heaven is 41C. Not even a spike over. The temp on the water hardly increases from standby (maybe 2C higher). Temp in to radiator is around 27.5C, out 29.5C at standby. When running benchmarks I get it up to 29.5C/31.5C at a max.

    I don't get it, every card I've had before this 590 and 690 has easily gone high in temp. And with such a low temp, what is it that prevents the card from running at a higher speed?

    My CPU (5960x) runs stable at 4.5GHz and the memory (Dominator Platinum CMD16GX4M4B3200C15) on 2666MHz (not sure how to OC it yet).
    [/URL]

  2. #2
    Moderator Array Nate152 PC Specs
    Nate152 PC Specs
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    Hi Sverre

    Try increasing the power target to the max too.

    Pascal is more efficient than previous gpu's, the gtx 1080 draws 180w max compared to 250w - 300w which is why temps are lower.

    Overclocking varies from gpu to gpu, some will overclock better than others and is the luck of the draw.

    Chino has a guide that may help you.

    https://rog.asus.com/forum/showthrea...Strix-GTX-1080

  3. #3
    ROG Guru: Yellow Belt Array Sverre PC Specs
    Sverre PC Specs
    MotherboardAsus Maximus X Formula
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    Memory (part number)CMD16GX4M4B3200C15
    Graphics Card #1ROG Poseidon GeForce® GTX 1080 Ti
    Graphics Card #2ROG Poseidon GeForce® GTX 1080 Ti
    Monitor1 x Asus 27" LED FreeSync MG278Q + 2 x Benq XL2420T
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    Quote Originally Posted by Nate152 View Post
    Hi Sverre

    Try increasing the power target to the max too.

    Pascal is more efficient than previous gpu's, the gtx 1080 draws 180w max compared to 250w - 300w which is why temps are lower.

    Overclocking varies from gpu to gpu, some will overclock better than others and is the luck of the draw.

    Chino has a guide that may help you.

    https://rog.asus.com/forum/showthrea...Strix-GTX-1080
    I set it to max before I started, same with Power Target and GPU Temp.

    I read the guide, which sadly isn't much to talk about.

    In Unigine Valley I can overclock to 2168MHz, but not in 3D Mark Fire Strike (2126MHz). Any reason? Isn't Valley one of the hardest graphics tests available? Does 3D Mark Fire Strik use the CPU, even in the 2 graphics tests, so that an unstable CPU (4x4.7 and 4x4.6GHz on a 5960 makes it a little unstable) might crash the program, even in the graphics tests?

    What is it that "stops" the overclocking? If not the temp there has to be some instability issues that will occur at higher frequencies, can these be compensated for with a voltage, as it is done with CPU's (Core voltage)?
    [/URL]

  4. #4
    ROG Guru: Grand Master Array
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    Quote Originally Posted by Sverre View Post

    In Unigine Valley I can overclock to 2168MHz, but not in 3D Mark Fire Strike (2126MHz). Any reason? Isn't Valley one of the hardest graphics tests available?
    I find that Unigine Heaven is more stressful than Valley.

  5. #5
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    I've noticed that Pascal GPUs do not overclock too well. Still, they're pretty much efficient and powerful as it is. If you overclocked it even a bit, then I guess that is still a good performance gain.

  6. #6
    New ROGer Array
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    Hi

    I have another question regarding the O8G OC... I somehow can't change my power target in GPUTweak2... why is that so?

  7. #7

  8. #8
    ROG Guru: Blue Belt Array jab383 PC Specs
    jab383 PC Specs
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    The lower voltage range of the current crop of GPUs seems to limit the overclocking. There are a few software tools that can raise GPU voltage a lot, but they don't do much good. Max clock in a given benchmark stays about the same.

    A higher power target will reduce drooping of voltage and clocks during a benchmark run, so it's a good thing to do when cooling can handle it.

    The lore is that temperature has a greater effect on Pascal overclocking than GPU voltage. 41C is great for ambient water cooling - quite a good waterblock installation. What TIM? The competitive overclockers getting the real high scores are using active cooling - chiller, phase change or LN2.

  9. #9
    Banned Array JustinThyme PC Specs
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    I cant speak for the 08G but comparing it to an A8G it should actuallt get better clocks. Im running a pair of A8Gs at 1972/1315 stable as a rock. I cant get it any further because of the power limit being 120%. Thats the only thing holding me back. Ive been contemplating using a modded Vbios to remove the power limit as Ive gone water cooling with them.
    But I do run the slider to max on volts and power.

    Click image for larger version. 

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  10. #10
    ROG Enthusiast Array
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    Hi there...

    Regarding OP´s question, have you checked the Overclocking Range option in GPU Tweak II? It basically removes any OC ceiling for core and memory clocks :P

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