To get the 4 extra turbo bins you need a P67, Z68, or Z77 motherboard. Have seen a MSI Z77 and a ASUS Z77 motherboard that can force all cores to the max single core speed. 3.8 goes up to 4.2 on all four cores with multi-core enhancement. On your ASUS H67 motherboard you can overclock the IGP, or increase the FSB to 103 usually or 105 perhaps for only an extra 100 or 200 mhz.