Long and short of it all is I have 3 z390 I boards and 3 CPU's all boards run fine with the celeron but none post with i7 9700k and i7 8700k I also have a 4gb RAM Crucial and 2x16 gb vengeance... obviously have updated bios to what partpicker suggests and higher have rolled back rolled forward cleared Cmos etc... also have 2 psu ... any suggestions welcome thanks 😊