Hey Thanatos! This may sound stupid, but if you can crank away at the small Ftts for hours with orthos and prime 95, then do the blend test and fail with the rounding errors after a somewhat short period of time, does that make it pretty confident that it is the ram causing the problem? With rounding on, so it stops, and runnin' on all your cores at the same time, of course! I would LOVE to have a somewhat positive answer regarding this!!
--Lupi!