Hi. I have a problem with one of my 4P builded with a H8QGI supermicro board and 4 opterons 6176 overclocked at 2652 mhz with Tear bios . Indeed , i can not explain why my PPD has been divided by two after a simple reboot . Indeed , normally my PPD with 8101 is near 12 minutes and now is near 21 minutes !! Of course i didn't change anything . It seems that my processors don't work at full speed because cpu temperature should be near 50 degrees and now is only near 42 degrees . However we can notice that there are 48 working SMP cores . In order to help my if you can , you will find attached a screenshot of my system . Thanking you in advance for your help .