LACT will overclock your machine with almost no restrictions.
The processor of current PCs is usually powerful enough to work smoothly with all types of content. However, some processes put a higher load on the processor — for example, when you watch videos.
XDA Developers on MSN
I found a tool like MSI Afterburner for Linux, and you can automate your GPU's undervolt
A V/F curve editor on Linux is finally available in a couple of flavors, but this one can run headless ...
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