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  1. #21
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    Quote Originally Posted by Anvirol View Post
    I managed to get -90mV and 34x multiplier on 4 cores. Tested "stable" 5-minute stress test and Cinebench 11.5.

    Update:
    Well that was unstable. I'm now at -70mV and passed 10 minute XTU stress test.
    Ya I had to change mine to -70 mV as explorer was crashing when copying files from external to internal. It's been stable so far after 2 hours of battlefield 3 and few hours computer use. The best test is using your laptop. Mine did fine in stress tests, and then failed at simple tasks. I think this is because stress tests use the lower multiplier as all 4 cores are active, and then when you're using computer for regular use and the CPU chooses the higher clocked x36 multiplier for a simple task, voltage is too low for that high clock, and crashes. Mixed use is best.

    Why don't you go ahead maxing out the clocks? Since they're not that high to start with. Have you OC'ed your GPU?

  2. #22
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    I maxed out my 770M GPU @930MHz with ASUS GPU Tweak and increased mem to 4200MHz. Unfortunately XTU doesn't allow higher than 34 multiplier on 4 cores

  3. #23
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    Quote Originally Posted by roryh86 View Post
    I was able to undervolt by -80 mV which allowed me to keep it at 3.6Ghz while having max temps of 85 degrees in Cinebench. Im sure with an unlocked bios, and people willing to access the CPU, delid it and reapply thermal paste, would be able to get the clock higher with stable temps.
    cant delid it because it has no ihs, but you can replace the thermal paste
    Click image for larger version. 

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  4. #24
    Helium Chilled Array _ PC Specs
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    Bear in mind that the 'CPU' now has:

    CPU cores
    GPU cores
    VRMs
    PCH

    all built into one piece of silicon. So it will run 'hot' versus last gen, for example, especially if you overclock as the VRMs and CPU are both working harder. Undervolting is definitely worthwhile if you can as the opposite is true.

    The only other major ICs (well, Flipchip ones) inside the G750 is the Nvidia GTX on the other fan and the Thunderbolt one, which is passively cooled.

    What the thermal paste lacks in ultimate performance it makes up for in longevity. Bear that in mind if you're replacing with another Also note if you're thinking of 'improving' the cooling - those metal bars that screw down the heatsink are supposed to be flexible. It's designed not to overtighten, avoiding crushing the small BGA elements underneath. The only other route of avenue I can think of is perhaps a light lapping of the copper base if you're unhappy with the finish, but don't take off too much as the tolerances as small.
    Last edited by _; 07-15-2013 at 05:27 AM.

  5. #25
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    I ended up using -59mV on CPU and 34x - 36x multiplier. I've been playing, doing 3D graphics and all kinds of every day usage and also stress testing. So I can say that it's stable now.

    Undervolting really helps with temps and my CPU is actually running cooler than stock settings, but with 2x higher multiplier.

  6. #26
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    Quote Originally Posted by Anvirol View Post
    I ended up using -59mV on CPU and 34x - 36x multiplier. I've been playing, doing 3D graphics and all kinds of every day usage and also stress testing. So I can say that it's stable now.

    Undervolting really helps with temps and my CPU is actually running cooler than stock settings, but with 2x higher multiplier.
    hehe I'm at -58 mV too. It seemed stable for a while at -70 mV and then randomly crashed after a while in BF3. It's been good so far. Have you done a lot of Cinebench OpenGL GPU tests? Because I've noticed that when you have the VGA overclocked/maxed out, it runs stasble if CPU is at stock, but when you increase CPU multiplier, it causes the VGA to throttle in Cinebench and give a very bad GPU score of like 20 fps (vs 60fps). When you start lowering CPU offset, this problem starts going away though. At -58, I have CPU and VGA maxed out with 67 fps Cinebench.

  7. #27
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    It seems to me that every time I push my GPU memory overclock higher, the more my CPU slows down. I'm not sure if it's downclocking or throttling cpu usage, but something strange is indeed going on.

    It doesn't really affect games, as CPU power is ample, but in benchmarks like 3DMark11 I see decreases in physics score.

  8. #28
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    Quote Originally Posted by Anvirol View Post
    It seems to me that every time I push my GPU memory overclock higher, the more my CPU slows down. I'm not sure if it's downclocking or throttling cpu usage, but something strange is indeed going on.

    It doesn't really affect games, as CPU power is ample, but in benchmarks like 3DMark11 I see decreases in physics score.
    That means your overclock is unstable. Try decreasing CPU voltage when you overclock GPU to lessen the total voltage of your system which causes the instability.

  9. #29
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    So what can be done if my G750jw is getting 96c as well?

  10. #30
    ROG Guru: Yellow Belt Array Flea0's Avatar
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    hmm when I launched cinebench the temperature jumped to 95C for the cpu package but once the fans caught up it settled at 86C right before finishing. I guess that means I got a good paste job?
    ASUS G750JX -- i7-4700 - 16GB - 128GB 840 PRO SSD + 1TB HDD - Nvidia GTX 770M - 120Hz 3D glossy display

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