Over/Under Volting & Clocking Improvements Under Review For Nouveau

[phoronix]

Phoronix: Over/Under Volting & Clocking Improvements Under Review For Nouveau

Karol Herbst has sent out his latest set of 37 patches for trying to improve volting and clocking on NVIDIA GeForce 400 "Fermi" GPUs and newer...

http://www.phoronix.com/scan.php?page=news_item&px=Nouveau-Clocking-Volting-V4

[c117152]

https://github.com/karolherbst/nouveau/tree/stable_reclocking_kepler_v4

Looking at the commits, it seems more thoroughly tested and on a wider selection of hardware compared to the first few patches. And v5 already underway too.. Very nice

[rabcor]

Nice, nice. The easiest and quickest way to effectively overclock your gpu (I mean without it just showing artifacts and crashing all the time). Also the easiest and quickest way to fry your card! A win win situation! Bettered be very thoroughly tested though.

[karolherbst]

Nice, nice. The easiest and quickest way to effectively overclock your gpu (I mean without it just showing artifacts and crashing all the time). Also the easiest and quickest way to fry your card! A win win situation! Bettered be very thoroughly tested though.

Well not really. I still respect the vbios and hardware limits. So sometimes you can only overvolt by 0.05V. And usually high end cards are running quite close to the limit already. This offset just directly manipulates the required Voltage for a clock. Everything else is still in place.

[karolherbst]

this also means, that if the required voltage for a clock goes over the vbios/hw limit, that cstates won't be able to set, where the other way around more cstates are available
so:

undervolting -> overclocking
overvolting -> underclocking

the heat production should stay the same in both cases, except when the highest cstate is still far below the voltage limits (usually on mobile chips)