We know with absolute certainty it's not a server utilization issue or memory (RAM) problem.
Just as I was reading that I wondered whether it could be a RAM problem -- a defective chip of some kind. This may be too basic but I have had it happen twice on different machines. Craps out for no good reason. Even when I had memory management software monitoring the RAM, nothing appeared out of whack except that it was. Replacing the chips has solved the problem.
In this context, how have you ruled out RAM? Slow activity would not rule out a physical problem with the RAM.
Troy
Those who shoot from the hip usually end up just shooting themselves.
Plan the grub and grub the plan.
Where is the party tonight? Who is bringng the drinks?