Hello, I finally got my miniITX gaming desktop (intel h77, i5 3570k, 8gb, sapphire 7870 2GB, 1TB sata) and it took me three days to setup all what I need.
My 3570k is running at 3.4GHz (Turbo disabled). My idle temps 26-42C. Under CPU temps goes all the way to 80-82C but I never got any alert or crashes or throttling .. as it seems to be okay.
Using Throttlestop, I set the speed to 2.2Ghz and the temps went from 80C to 62-65C. But I don't know exactly how much of performance did I lost.