Yep, i saw your thread about that. I don't know exactly how it can happen, but maybe you can try to :
Check the fan, are they spinning normally ?
Check your BIOS on fan settings. If you set in auto, when you just turn on your PC, fan won't spin directly. BIOS will check the CPU temp, at certain value then fan will start to spin with very low rpm and it'll spin faster according the rising of CPU temp. Try to disable the fan option, see if your fan will spin on full rpm, load the OS, check your temp. Are there any changes ?
When my Q6600 at stock speed, after loading the OS, the fan are spinning intermitently at 800 rpm for 4-5 seconds.
When it overclocked, after loading OS, CPU temp idle : 35°C, cores: 48/48/50/51°C fan spin at 876rpm
CPU temp load: 52°C, cores: 66/67/68/70°C fan spin at 1223rpm.
Remove the fan, check if there's dust.
Check if all screw are tight. Or maybe trying to re-apply thermal grease and re-seating the Gemini.