You need to read some guides on overclocking. You are obviously new. Youre starting off the wrong way. You shouldnt be using auto for voltage if its setting it to 1.6volts for 2420mhz. Thats way to high. Thats the worst opteron ever if you need 1.6 volts to get 2.4ghz lol. Also im not sure why you said you changed the multiplier to 11x. By default its at 11x.
Your temps are fine though. Could be better but...Im sure its your voltage causing it.