Comment 68 for bug 1158689

For the reclocking to work on 3.13 you need to apply this patch:

http://cgit.freedesktop.org/~darktama/nouveau/commit/?h=devel-pm&id=74556533b2cc3dd787ba9fc8a346177116d1a68e

And you can change the performance level with /sys/class/drm/card0/device/pstate
(I think the command line options don't do anything anymore)

This new 3.13 reclocking might just hang your system though (it does for mine on the two computers I tested on).