We had a T110 that was crashing because of an Uncorrectable Memory Error. See this thread:
Many dell servers are powering our Faxo but this T110 was the only one we ever had problems with.
After switching the memory out and having it crash again and again we finally did more detective work and determined that by disabling the C-States in both the BIOS and the OS the problem was fixed.
Hopefully this might spare someone hours of aggravation...
I am having the same problem. I have used T110 II. How do I disable the C-States in both the BIOS and the OS? I think the RAM is just dead.