Mobo: ASUS P8Z77V-Pro
CPU cooler: Corsair H100i
Yesterday I upgraded from an i5 3570k to an i7 2700k. My 3570k was OC'd to 4.4 GHz.
Today I tried to OC my 2700k to 4.7 GHz and when I did a stress test it showed that I was only pushing 4.4 GHz. (using prime 95 and CPU-Z)
I went back into the UEFI BIOS and set everything to default then back to my OC settings. I tried stress testing again and it still stayed at 4.4 GHz.