Hi Steve, I know this thread is a few months old, but thought I'd offer my insights to anyone with the same problem. I too have T605 and I had a similar problem about 12 months ago. Server would NOT boot at all though. Just out of warranty as well! The display would show E122D/E122A with CPU1, sometimes this would hang mid sentence. Usually it would display E1000 Fail Safe at the end. I tried re-seating CPU's and moving memory around with no effect. Eventually I just replaced the motherboard and all was fine, however..... I have just had the new motherboard do exactly the same. Luckily I had not thrown the old one out so I decided to compare them. I found that on both motherboards  there are four 1500uf 6.3v capacitors, two between the atx connector and memory 'A' Slots and two behind the onboard NIC (next to the memory  'B' slots). They were all bulging on top (not a good sign). I de-soldered these and replaced them and now I am back up and running. They were the only green Sanyo capacitors on both my motherboards, but that may not be the case with all of the motherboards Dell/Foxconn made. Anyway, this may or may not help with your situation. With it being voltage related I thought it might be worth a look. If you want to have a peek I think you need to take the fan ducting off to see the capacitors in question. Regards, Pete 
Hi there  Have a Power Edge T605. Error message in LCD panel - E122D CPU 1 VDDID and then E122A CPU 1 VTT. I am able to run the server BUT only if I put the RAM in the 4 'B' slots. Any clues? Steve
E122A and E122D