Well, tried one stick from the new set, and the same 4 locations or blocks have errors, again on the first pass this time on test #3.
The memory timings are definitely meant to be 9-9-9-24 2T.
Seems the problem might be that it defaults the memory Command Rate to 1T, and even though I go and change it to 2T in the "Channel A Timing Settings" page, that change doesn't stick. The M.I.T. Current Status" page still shows tCMD as 1, as does CPU-Z v1.58.
Before the change, the "Channel A Timing Settings" page looks like...
Command Rate (CMD) 1 [Auto]
and after I change it looks like...
Command Rate (CMD) 1 [ 2]
Is that what you'd expect to see after changing it??? As I said above, everything else shows it's still set to 1.
Running out of ideas except to downgrade the BIOS to F4 and see what happens... curiously the F5 BIOS download size is bigger than the F4 BIOS by about half a MB, and is also the same size as the F6 BIOS for the rev 1.1 version (I have rev 1.0). I wonder if F5 was actually for the rev 1.1 version and it's not quite compatible.
Far out...