We might be putting too much hope on AMD, let's hope it does deliver

I remember these steps:

1. Turbo mode hack on sandy bridge to allow 4 extra bin (i.e a max turbo value of 3.6GHz with one core active would become 4.0GHz, 2 cores active at 3.9GHz insted of 3.5GHz etc.)

2. The above was disabled on Haswell but a new functionality called Multicore enhancement could lock all the 4 cores at max turbo value

3. SkyOc on skylake which allowed unlimited BCLK overclocking but disabled speedstep, turbo, c1 states and core temp reporting

What will be next?

Sky OC allows for a quick and dirty OC on Z170 boards when paired with a non-K CPU, much like the implementation of non-Z overclocking on previous generation Haswell boards. With B/H series Haswell boards the user had to be willing to accept the fact that the OCing utility was very limited in so far as the number of tweaks that were available, no LLC, no RAM overclocking, no BCLK settings as well as fixed voltage even if you selected "adaptive". This is now and will always be the case when a manufacturer provides and unsupported feature. 

Does that mean the feature is bad or should not have been included? Obviously not, there are always those to whom the weaknesses of said features will be offset by the benefits. ASRock consistently pushes the boundaries with it's products, especially where it comes to adding extra value for it's users. Not all of these features will take off and not all will remain in play but the fact that they keep trying and are willing to risk the ire of chipset and CPU providers is truly a testament to their commitment to us as end users.

It is sad that Sky OC is being phased out but for those who already have capable boards with the few BIOS versions that support it, you still get to use it  

I am having exactly the same problem with my Z170M Pro4S, on both L2.23 and L2.40, firstly there is no voltage control, only voltage offset options, secondly, if I change my BCLK to anything, the voltage will always be stick at auto (1.088v).

Should I refund this board and go for a Gigabyte or Asus which have similar price?

you can set a vid offset to a non k cpu which will only work if you leave bclk @ auto.

when you increase bclk you are able to set any voltage you want but it will not affect the vid, so you are very limited to the oc by the default vid..Yes, you can leave offset @auto -> 1.05v, or +400 -> 1.05v.

i already mailed to the support weeks ago but no answer.