Originally Posted by vickie
well this article is from 2015 , it doesnt apply now.
I have a z170 a pc mate msi motherboard with non- k i5 6500, used the mentioned bios in article it doesnt happen , I also deleted mcupdate_genuineintel.dll , still OC worked only once but then poo
It does work, I did that on 5 (scratch that, counted now and turned out to be on 6 or 7) boards this year, but you would need to search the MSI article on how to DOS re-flash your bios, cause I think this is your problem, as Intel issued microcodes to block returning to older BIOSes and thus blocking the actual BCLK OC to 102BCLK. IO never had a problem with OC sticking only once, unless there is not enough voltage and power.
Downgrading is possible, but requires DOS reflashing[IMG class=inlineimg]/forum/images/smilies/smile.gif[/IMG] I DOS-reflashed two Asus boards in 2019, went up to 4.5GHz on i5-6500 and i5-6600 and sold all of them after that, as I was just experimenting. I also BCLK-OC'd on a Gigabyte z170 UD3 board, but it had an older BIOS form the get go, so I didn't need to downgrade via DOS, just upgraded the BIOS to one from Play3r. I also did it on a MSI z170 m7 motherboard, but that board had BIOS-reflash "hardware" on it (also on two Asus Maximus boards that too have BIOS-reflash), so I could flash whatever version of its respective BIOS I wanted on it, back and forth. All in all it's still very much possible, if you know how to Dos-flash the BIOS on z170 chipsets. I tried and bricked a z390 with that method, but was fully successful with two Asus z170 boards, even flashed the z170A bios on z170AR, lol [IMG class=inlineimg]/forum/images/smilies/smile.gif[/IMG] Then reverted the AR board back to its original AR bios via the same DOS-flash.
I do not know if this is the right guide. Never DOS flashed on MSI, so I am not responsible if this does not work, but here:
MSI BIOS Update Instruction By DOS Tool