I checked the BIOS but my cpu and other hardware are still the same. But I'm still experiencing the serious lag issue. Infact when I run CPU-Z, it gets hanged up and gives the "Error code 0x102 (258)" message. I googled this error and found that this means a "deadlock" . Btw I reinstalled the latest version of CPU-Z and still getting the same error. I think it is related with the lag issue. All applications are taking more time to load. Please help!
Have you booted into bios to check temps and make sure all of the multipliers are all the same? ;o