ASUS RD has unlocked the OC potential on H87 and B85, so we've just released a whole set of BIOS' that will OC K series CPUs across our boards. Please note that OC capacity won't be as good as Z87 series due to the inherent design difference, but overclocking via multiplier adjustment is at least now possible.

Project Name BIOS Version
H87-PRO 0613
H87-PLUS 0411
H87M-PRO 0713
H87M-PLUS 0411
H87M-E 0511
H87I-PLUS 0507
B85-PLUS 0413
B85M-E 0408
B85M-G 0410

Please check the product pages early next week [11th July onwards].