Cannot post without memOK button.

Hi guys,

I recently flashed the bios of my Asus Z170-A with the latest version (3401) so I could enjoy my newly acquired 7700K.

But I cannot post and access the bios and windows without using the memOK button everytime I restard the PC (the led is not even red or something).

I tried some other ram and another 7700K that I had in another build but nothing changes, it still doesn't want to post without hitting this memOK button.

And if I swap the 7700K to the 6600K that was in the motherboard before him, it works perfectly!

After reading all I could find I'm short of ideas.

Thanks for your help.