2.6.10-1.1110_FC4, running on top of FC3 userland.
Will attach logs.
Created attachment 110338 [details]
Almost certianly related to bug 145291.
Created attachment 110342 [details]
Created attachment 110346 [details]
This is with .1114.
Created attachment 110377 [details]
Just in case .1115_FC4 was feeling left out.
Created attachment 110542 [details]
So, turning off:
"Unused PCI Slot clock"
"Cool & Quiet Support"
in the BIOS magically fixes everything.
OK, it's just Cool&Quiet being enabled that triggers the bug.
ISTR you followed up offlist with the AMD maintainer, who thought this was a
hardware problem ?
This was the 'clocking down chip/memory causes memory errors' problem, yes. Closing.