Just got this with baseline default settings, no XMP.
BTW you should try the 0002 Maximus Extreme Bios that was posted. Allows me to run my Micron Gskill (5200 XMP) RAM at 5600 with tightened subs/terts, where before, only 5400 was possible (5600 was only possible with stock timings).
I pretty much used his primaries he posted here (except I set tRAS to 48 instead of his)
And i set VDD: 1.35v, VDDQ: 1.40v and VCCSA 1.25v and that weird tccd_l_dll to 8 (something at the very bottom of the memory timings)
Flashed 0702 over 0002 and used XMP I to test and no problem after 2 passes so far.
I will probably flash 0002 again and test using XMP I with voltage tweaks. Might try 0803 again as well. Donâ€™t have windows installed yet.
Thanks guys. Clearly, I donâ€™t need to RMA this memory kit.**
FYI - I was able to pass MemTest86 numerous times with XMP enabled, but as soon as I tried running Windows I started getting all kinds of blue screens. When I disabled XMP, Windows was totally stable.