I had overclocked my Q6600 with 1.2625V, MCH overvolatage +0.1V.
RAM 2GB 800mhz timmings 5-5-5-15
Temperatures idle around 33-38 degrees celsius, however with OCCT testing it rised to 62-65 degrees celsius. I just today upgrades to a Xigmatek s1283 with Arctic Silver 5 thermal grease. I have no idea what this is caused by.
Mobo: Gigabyte P35 S3G
PCI auto which sets it to 100mhz