[Nouveau] [Bug 75094] NV92 is faster and runs games fine than NVE6, why?

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75094

Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |NOTABUG

--- Comment #2 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Asif, I understand your frustration. However this is due to the lack of
reclocking in nouveau. Kepler cards are, by default, usually clocked at ~50MHz,
while your 9800 probably runs at 1GHz+. Since we can't (currently, reliably)
change clocks, you end up running at that default frequency, and it's no
surprise that the Kepler card is slower when its clocks are 1/20th of the speed
of the 9800.

There _is_ highly experimental reclocking available, feel free to try it out,
but this is a "will void warranty" type situation :) You'll need to grab the
latest 3.14-rc, remove the "return -ENOSYS" in the pstate update handler, and
potentially boot with nouveau.config=NvMemExec=1 if you're feeling particularly
adventurous.

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