Right, no go with the adapter, still does the same thing at exactly the same point.. swapped the memory slots, tried with 1 stick, tried with the memory thats in this pc now (rather than memtesting for the moment)..
I have 2 xp discs, tried both and they both do the same thing at the same time (this is 2 versions too, xp home and xp pro 64).. temps totally fine.. see! (this is after 4 "fails")
So I guess it MUST be the psu.. too many other things I've varied.. also the issues with the gfx card must be psu related seeing as it works fine in this pc?
So, question.. ocz modstream because it'll fit better or hiper modular and modify the back of the pc to have the psu hanging out about as much as the rad does?
And a pic of the current state
real work in progress! (psu unscrewed, fan taken off rad to blow over mem/northbridge when switched on, no gfx card attached to block)