I got my 5820k 4.425 ghz on a 1.308 adaptive voltage and a 125mhz bclock. my temps are low like 45 deg on load with noctua nhd-15 and a very very good high flow positive pressure case temjin tj04-e. it was acutally stable at 4.5ghz and was crashing at 4.6 ghz. i settled in at 4.425ghz ftw and for stability