Interesting finding following an interesting article from Hardware.fr (
http://www.hardware.fr/articles/959-5/nouvel-agesa-diminuer-latence-ram.html)
Basically the latest BIOS with the new AGESA microcode from AMD introduced a memory related option to improve RAM compatibility. This options is called "Bank Group Swap" in the Asrock bios and if you leave it on "Auto" the latest BIOS will disable it (again to improve compatibility) but it will cost you performance wise. So if like me you never had an issue running with it enable before (meaning with the previous BIOS/AGESA) you're better off enabling it manually. In my case you can see the difference in the below screenshots.
well i just found it in bios (for others the path is advanced>amd cbs>umc common>dram mapping)
and altered it (enabled)
and ran aida 64
comparing to your numbers it seems i cannot really tell for sure (allthough its closer to your on mode than off of course)
the reason being was
run 1 i had in some areas quite a significant higher score and the remainder were close or just a bit higher (1-3%)
run 2 some were quite a bit lower than yours -5%
run 3 lower
run 4 lower
run 5 again now at least two sections considerably higher eg first read from memory yours was 45000 ish mine 47000ish one of the others i think level copy was 100 gb higher yet run 2-4 maybe 50gb less
i do recall the actual ram latency was between 70ns and 75ns for all runs whereas i remember on first update after loading version2 bios without even touching bank group it did hit the 68 ns..........
to say im a bit baffled is an understatement it seems i cannot trust consistancy of results from aida myself to prove if i do or do not get any advantage from any changes i make in bios with this taichi
it is nice though to know theres someone else in london with the same board and i think maybe the same ram as myself (taichi and gskill tridentz c15 3200)
thank you for fining the link though it made good reading
they other tip they mention about 'dram gear down mode' i cannot find in my taichi bios version 2