Im thinking this is 100% hardware related. Different regions get different hardware. I changed memory sticks out with Gskill 64GB kit 2800Mhz part number F4-2800C18Q-64GRS with a Jan 2016 date code on the sticks. Immediately went to fast boot disabled and it stayed that way, changing it did nothing. Could not roll back either with the new sticks in. Ended up in a mess, complete tear down to remove CMOS battery to reset. Would still not roll back stuck on 208 with all sorts of weird issues. Put original memory sticks back in and it went straight back to where it was working perfectly with BIOS 208. Rolled it back to 206 using cmd prompt no date trick without a hitch. More about it in the fastest memory thread.
agree with you
I wonder why all of you are upgrading BIOS, actually? Description says that 208 is "Update IRST". If that means Intel® Rapid Storage Technology... so maybe it has been borken rather than fixed?
Mine come with 8gb(samsung), I just bought 2x8 ddr4, but with same cas/ras(corsair), in a couple of days I will get it, wonder if it will work, after all I read here...