Ok, some things changed very queerly when I got home from school today. Notibly, my Core 2 Duo e6300 was idling at 24C (stock heatsink)

That was a bit strange, because it normally idled at low to mid 30's. Frequency was never changed. Either I'm lucky, or one of my sensors is dying. Under load (SuperPi) it barely surpassed 30C.
Another thing, the voltage on my board is extremely weird. My core voltage jumps between 1.15 (minimum) and 1.30V (maximum). It usually jumps between 1.15 and 1.28. Is this normal? It worries me that it's not a more precise value.
Also, the fan on my vid card (eVGA Geforce 7300GT) is now making the most annoying humming sound ever. It sounds like it's off a little bit, because sometimes when I boot, it wont make the noise, but sometimes it will. I'd say it does it roughly 9/10 times. VERY annoying. Any way to fix it? I bought it from Mysterybyte about a litte over a month ago.