@bebop350 - The proper way to change an MSR is to do a read - modify - write. First you need to read the MSR to find out what is in there. Each bit in this register means something different. Doing a wrmsr 0x1A0 0x0 would clear everything in this MSR. You do not want to do that. You just want to modify (clear) bit[16] to disable SpeedStep.
If the initial value is 0x850089, that means SpeedStep is enabled. To disable SpeedStep, you need to wrmsr 0x1A0, 0x840089
That should work in Linux or Windows. Both operating systems use the same CPU.
It was just an unstable suicide run but it makes for a nice screenshot.
My first ever trip to 5 GHz. I love this old technology!