I did a clean bios install, clear cmos power down, and bios flash Back and its the same.The best way to rule out any setting discrepancies would be to do a Clear CMOS on both boards (pressing the Clear CMOS button on the rear, while the power is removed). Then you both immediately enter the BIOS and check for this setting. If there's still this difference (one has it and one doesn't), then a difference in the RAM kit is probably the most likely explanation.




Nop on is in the UK mine is in portugalHmm. Can you swap the RAM between the PCs for a test?
thanks alot my friendYep, those are different. The UK system's kit additionally has two EXPO profiles, yours only has the two XMP ones. The UK kit's modules have a temperature sensor, yours don't. They are using the same memory ICs (same chips from Hynix), but the SPD programming and some components on the modules seem to be different, and that can explain why the BIOS option doesn't show. Maybe it will only show if there is an EXPO profile for AM5.