Get your OC friendly BIOS for the latest P67 Boards here
 

GIGABYTE

- P67A-UD4 (F6x): http://91.121.148.119/downloads/BIOS/p67aud4.f6x
- P67A-UD5 (F5x): http://91.121.148.119/downloads/BIOS/p67aud5.f5x
- P67A-UD7 (F6x): http://91.121.148.119/downloads/BIOS/p67aud7.f6x

ASUS

- P8P67 (1053): http://91.121.148.119/downloads/BIOS...-ASUS-1053.ROM
- P8P67 Evo (1053): http://91.121.148.119/downloads/BIOS...-ASUS-1053.ROM
- P8P67 Deluxe (1053): http://91.121.148.119/downloads/BIOS...-ASUS-1053.ROM
- P8P67 Pro (1053): http://91.121.148.119/downloads/BIOS...-ASUS-1053.ROM
- Sabertooth P67 (1503): http://91.121.148.119/downloads/BIOS...-ASUS-1053.ROM
- Maximus IV Extreme (0653): http://91.121.148.119/downloads/BIOS...-ASUS-0653.ROM
- Maximus IV Extreme (0065): http://91.121.148.119/downloads/BIOS...-ASUS-0065.ROM

INTEL

- DP67BG (1780): http://91.121.148.119/downloads/BIOS...J.86A.1780.zip

BIOSTAR

- TP67XE (F103): http://91.121.148.119/downloads/BIOS/P67AF103.BST

ASROCK

- P67 Extreme4 (20C): http://91.121.148.119/downloads/BIOS/P67EXT41.20C

Thanks to Massman & Pt1t for sharing

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End users experience a nice boost in max OC, previous max OC on Air ~4.8Ghz now:


http://hwbot.org/forum/showpost.php?p=87060&postcount=1

And the max safe CPU voltage is.... :)