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You Can Now Overclock Your Intel GPU Under Linux

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  • #16
    Overclocking an HD4000(GT2) on a i7 3770 is working great!

    Salut,

    I made a few tests and I was able to reach 1.5GHz easily with the GPU. I only increased the voltage by 100mv but I am not sure it was really necessary.

    Currently, everything is stable. Actually, GNOME-shell runs better & smoother than earlier.

    I am on Debian Wheezy 64bit with GNOME-shell 3.4.2-7 + some pkg from the experimental repo.

    mesa 8.0.5-4 (wheezy) + 3.8.3-1-gpuoc-debcool-00 (3.8.3-1~experimental.1 + Daniel Vetter's patch) + xserver-xorg-video-intel 2:2.20.14-1 + libdrm-intel1 2.4.40-1 + i965-va-driver 1.0.19-1 + libva1 1.1.0-1 & libva-x11-1 + libva-intel-vaapi-driver 1.0.19-1 (all previous from experimental repo)

    Here are some values I've got from sysfs:

    min= 350
    from gt_cur_freq_mhz= 400
    RP1= 650
    from gt_cur_freq_mhz= 700
    RP0 = 1150
    from gt_cur_freq_mhz= 1250
    from max and gt_cur_freq_mhz= 1500 !!!

    Here is the list of games I have tested in 1920x1080(+-15min each):

    Games included in Debian
    0 A.D = perfect!
    Nexuiz = vsync on + most of the graphical options at their max.
    TORC's = all options at their max.
    Chromium = Perfect
    OpenInvaders = "

    Steam games:
    ROCHARD = perfect!
    i Bomber Attack = perfect!
    SHANK 2 = perfect during the game by it freezed when I tried to quit.
    Trine 2 = could be better. Low quality texture, vsync off, anti aliasing off. The mouse didn't move smoothly.

    remark: I don't think those issues were related to the overclocking but to steam or something else...

    Nothing to say about the temperature; I haven't found any changes. When the GPU is at 1500MHz and the CPU is at full charge, the temperature still 60° maximum and lower than 30° at idle.

    I'll try more tests and games later and give you feedback.

    Originally posted by Ren Höek View Post
    You might try http://code.google.com/p/i7z/ to monitor your CPU under load.
    While other methods are sometimes misleading, it shows (at least for me) that turbo is indeed working...
    Awesome, huge thanks for this. It is very usefull.

    A+
    Debcool

    PS: Thanks to Daniel Vetter and all Intel Open Source's dev for their effort!

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