October 26th, 2010, 04:21 AM
I am running a desktop system with a core i7 factory clocked to 2.66 ghz, which I am attempting to overclock to 3.2 ghz. The overclock is functional in Windows, where I can observe a noticeable performance increase in games and the like. In Ubuntu, however, the overclock seems to be disabled by the built-in CPU scaling. The gnome cpu frequency applet still lists frequency options from 1.6 to 2.66 ghz, and I cannot discern any performance improvements from stock CPU speeds. Disabling acpi_cpufreq might allow the overclock to take precedence, but with ubuntu 10.10 it appears that acpi_cpufreq is built into the kernel. Is there some way to disable it without recompiling the kernel, or is that the only option available? Alternatively, is there a way to keep cpu scaling while also enabling the overclock to take effect?