Any other symptoms?

It is fidgety... by which i mean it will sometimes stutter when coming back from a pause or take a long time to start playing after a pause, but those are symptoms of it having to read from disk more than anything. Other than that it just runs hot. Everything else seems to function fine.

Mark, is there anything i can look for or trace with a multimeter myself before i ship the mainboard off? I'm reasonably competant around components. Is there any way to check via software how much RAM it's able to use after bootup to determine if it is indeed a bad chip?

Looks like i'll be testing the MkIIa board swap out of necessity! =]