"After I posted about my FC8α build (link), Streacom made contact with me to politely tell me what they thought about my temperature and sent me their thermal compound to help with the fix. A fellow redditor also replied to my post suggesting that I set the maximum processor state to 99 % which should disable the overclock and run the CPU at 65 W as intended. I lapped my heatsink, applied Streacom's thermal compound, set the maximum processor state to 99 %, and ran the AIDA64 stress test. The temperature of the 5700G dropped from 96° C to 73° C (23° C ambient). 7-Zip benchmark went from 89838 MIPS to 82105 MIPS from the lack of overclock, which I am happy with."
Source: reddit