Thanks so much for setting me in the right direction, you rock
Testing 2400MHz now (anything higher seems a no go at present). I cleared the CMOS first as I was getting erratic results otherwise
I tried 2 for for both those settings and rather than a boot loop, I got 15 straight to 51.
With 3 for both, I got 15, a boot loop, 15, 15, 15, 03, a boot loop, 15, 15 15, and then after say 10 to 15 seconds, a successful POST which I could repeat and not have to reset the CMOS
With 4 for both, I got 15 and a full POST with no boot loop and again I can repeat that and also set other timings and get a successful POST repeatedly
I assume 4 or say 5 is alright for both of those read/write data slews on F5N, Sin?
This is great now, thank so much