Well I have been going for four hours on this module now, this is the time period which is due a crash.
I am hoping cleaning the slot by repeated re-insertions of the module has cleaned the contacts up an cured the problem, but it's a little to early to say.
I suppose that a slot which has had the same module in for year and years is likely to get rather corroded and tarnished and when yuo put in another module it may be resting on some of the corrosion causing a poor contact, which could explain my problems.
It crashed at about 5 or 7 hours after boot up.
not too sure as I was using the post time to timestamp posts but the mods do not like me
replying to my self so I was discourages from posting and providing useful information here.
I also seemd to get a crash burning memtest, (unless it is supposed to reboot after burn which seems
unlikely) it was burning an ISO so it does not know what it was burning.
Memtest showed errors, but because I was unfamiliar with memtest I did not notice for a while
it seemed to report them straight away.
I ran it again and it found no errors.
Will try another burn.