skippyboy92362 :
At this point it kind of depends on which motherboard manufacture is conforming with Intel's guidelines for the Z170 bios. In other words do the research on the board you picked out before you buy it. Also I don't expect this to be lasting very much longer now that the secret is out there will be some changes from Intel in the near future on the non K 1151 Cpu's.
The most recent event to happen was in February, when intel forced AsRock to provide BIOS for their z170, b170, and h170 chipsets that stop BCLK tweaking.
It's been 2 months, and they haven't stopped ASUS, GIGABYTE, or MSI from keeping their non-k overclocking chipsets.
In other words, you can still buy a board for non-k overclocking if you know where to look.
And the microcode update was instituted through the BIOS update, not through a OS update.
How do I know this? I'm overclocking my non-k 6400 right now