Ok, this discussion has gone on for quite some time now. Although I appreciate @_mat_'s techinical discussion and @mickulty's help in getting him a board, finding the exact root cause of these speed differences will only help for future versions of GPUpi, not for this competition.
Therefore the more urgent need in my mind is a for a final moderation decision for this stage. There are 3 possibilities, some more realistic than others:
Allow only slow AGESA versions in the competition
Allow all AGESA versions in the competition
scrap the stage
Since people have already bought hardware specifically for this stage, I don't think 3) is a good option. That leaves 1) and 2). 1) has a higher moderation overhead, since mod(s) will have to look at the motherboard tab of every submission in this stage. 2) has a lower moderation overhead and the added benefit of making in-competition submissions competitive with submissions outside the competition. If 1) is picked, we could have a submission on air 1 day after the competition that is faster than an LN2 submission inside the competition.
Having someone with a F1A75-V PRO or F1A75-M LE flash back to the oldest BIOS and test it would help here as it would give us enough confidence that this is not a Gigabyte-specific thing (however unlikely that may be).
TBH after that I'd suggest moving this whole discussion into the GPUpi development thread.. there are 7 more stages to talk about in the DDR3 subcategory! ?