I've overclocked my CPU (4930MX) to 4.0GHz all cores with -0.45mV undervolt using IntelXTU on Windows, which saves the changes to the BIOS. I can run Prime95 well enough on Windows without it bogging down. Sure, after about 15 minutes the CPU starts to thermal throttle (15" laptop, no miracles possible), but it rarely hits the kind of paces Prime95 puts it through on regular usage, even on Ubuntu. I've had sensors running on Ubuntu, kept an eye on CPU usage and temperature and it all seems fine, but after a while my system just hard resets. It's obviously because of the OC. The hard reset resets the overclock setting in the BIOS and it no longer happens after coming back up with stock clocks and voltages. Anyone else have experience with overclocking on Ubuntu and Linux in general? Were you able to work around clock issues on Linux?