Every official released BIOS version from ASRock I've tested has non-k bclk overclocking capability above 103MHz.
But IMHO this mobo is buggy, several options in BIOS does not work properly (like AVX offset, saved profiles)...
For me the major problem is: if you disconnect the psu cable (or had a power outage) you "lose" your BIOS settings, having to press F2 to enter the BIOS and save settings every time the the psu is powered off?