Hello,
About that GPU undervolting, I'm self quoting and self responding.
Not much experiences found on the subject so I figured I'd post what I gathered.
The GPU frequencies work in levels. I wrote down for my GTX 1080, in Mhz : 1911 --> 1898 --> 1886 --> 1873 --> 1860 --> 1848 --> 1835 --> 1823 --> 1810 --> 1797 --> 1785 --> 1772, each one corresponding to a lower and lower voltage.
As temperature rises, max GPU frequency goes down in levels. So the higher the temperature, the lower the frequency : at 83° C the frequency doesn't go above 1810 Mhz. This is also why the temperature rises quickly at first and then slower as the voltage goes down with it (and with constant fan speed).
After a quick research I found an easy way to undervolt the GPU with MSI afterburner so the temperature drops significantly.
Youtube source :
Basically, add a ligne in the MSI AB file to enable monitor voltage, press ctrl+F to show the frequency/voltage curve editor and choose the max voltage matching with the max frequency you want. Do some testing with benchmarks and games to find the good spot for stability.
For the moment I set 1911 Mhz to 950 mV but I shall continue some testing.
Not only the temp drops but frequency stays higher than before so overall performance is improved when benchmarking and playing. More important for me, as it was the main goal : fans speed never go beyond 53 % now
You can overclock and drop temps at the same time but it's not the subject here.
To sum up : lower temperature, better performance, lower consumption, less noise.
It's not as permanent as BIOS CPU undervolting, you need MSI AB but it's still very good to know.
Problems? See this thread at archive.org.
hmscott likes this.
