Hi Guys, First of all, thank you so much for this thread. I can definitely see improvements on my Cyberpower Evo (basically an XMG clone from what I've heard) in terms of C0% (1-2% on idle) and PKG Power (1-2W) but after doing essentially everything in the guide and then some, I still have 2 big issues. 1 - The issue I originally was trying to solve when I found this was that sometimes when I turn on the laptop, the fan stayed on consistently, there was high CPU usage on one core (like 30% but still) and the laptop was constantly going from 40 - 50C. All of this on idle. I can't confirm if these steps have fixed that issue fully or not, but it still happened on one of my reboots where I had disabled the thunderbolt port in BIOS. I also ready somewhere in the thread that this might have some relation to waking from sleep instead of a dry boot? Has anyone found a fix for this issue as I might have to RMA the machine if I cannot consistently get rid of this high CPU bug. For reference, even before all the optimisations in this post, I get around 6-7 hours on balanced doing basic tasks when this bug doesn't happen. 2 - No matter what I do, I cannot get the CPU C-States out of C2 and C3. Right now as I type I have 95% C7% in Core, but my package states are around 20% C2 and 60% C3, "PKG" reads around 80. My C0% mostly sits between 1-2 but has random jumps to like 4 or 10 for a split second even on Idle. PKG Power is sitting around 1.5W. Some of the things I have tried, other than the basic following of the guide (essentially all of which I've done): - I have disabled my SD Card Reader slot in BIOS as I was getting a sleep error in powercfg energy report, the mentioned Registry Edits to fix this didnt seem to exist for the SD reader (I fixed it for another USB port). - I've tried to disable thunderbolt, as I've noted some people mention it can be an issue here. Ditto for driver updates. Only seemed to make it worse disabling it as I mentioned earlier. - Drivers installed via Windows update, Intel update tool, direct from sources like Realtek, and I even tried Driver Booster as a last resort. - My CPU came from manufacturer with a -50 undervolt, I haven't modified this value but I did switch from "SpeedStep" to "Speed Shift" in the ThrottleStop interface @ 128. Overall, I am happy with the power usage for now and can make further minor modifications in the future, but I need to get this random bug and the C states fixed first. Does anyone have any suggestions of where to go from here? Only things I haven't really tried are a full Windows reinstall and an RMA, both of which I'd prefer to avoid if I can solve this myself. Thanks in advance!