kolkoo

Sorry can you elaborate - what kinds of problems? Been thinking of getting a 9900k to upgrade the 7700k in my Apex Z270, currently running 5Ghz rock solid delidded 7700K on water with mem at 4Ghz so I'm curious if similar is achievable on Z270 with the 1801 bios. Also did you flash using flashback or programmer and is there a difference between the two? Thanks