When you say fails prime, small ftt or blend?

maybe try setting trtp to 8, seem to remember that coming into play for someone else over on i4memory.com.

Also the other auto settings. I would have a look at what memset is reading, and maybe try loosening up some of these. Like twtr, write to precharge etc.

I've had situations on the DFI where small ftt ran a lot longer than blend, indicating memory was causing the problem.

probably way off, but just a longshot.

RLM