System halted at 0.80 GHz frequency.
System halted at 0.80 GHz frequency.
Hey there! I see your CPU has been running at a low 0.80 GHz lately. You tried removing the cooler, cleaned everything, reset the CMOS twice, and adjusted BIOS settings, but nothing seems to work. You're not alone in this situation—let me know if you need more guidance! 
800mhz operates in a low-power mode, usually during idle. This is typical. Consider adjusting power savings in Windows to Balanced or opt for performance to keep higher frequencies active.
Intel often encounters this problem. Download ThrottleStop from the provided link. Check the Limit Reasons window to identify the cause of CPU throttling. If the BD PROCHOT indicator appears red, clear that section on the main ThrottleStop interface to see if the issue resolves. Share a screenshot of the Limit Reasons if additional details appear in red. Most cases at low temperatures involve BD PROCHOT.
I managed to adjust the 0.80ghz setting but it’s stuck at 3.60ghz and won’t change up or down. Overclocking causes crashes. I’m planning to replace the CPU cooler and possibly the power supply right away, since what I see points to a power issue. The Hyper Evo 212 is stripped, making installation really tough—even a small adjustment means having to re-assemble everything. That’s quite frustrating.
If your CPU is limiting performance, try a basic benchmark such as TS Bench. Capture a screenshot of ThrottleStop with the Limit Reasons window active while your CPU is running. Red highlights show throttling occurring. If your heatsink is missing, that’s likely the main issue—ensure solid contact between the CPU and heatsink to avoid further problems.