Anybody ever have a similar situation, please tell me what steps you took to determine whether it was the RAM or another hardware issue? BTW my machine is a E510 with Pentium D 820 2.8GHZ and it has 1 GB of Dell Branded RAM (PC2 4200 533MHZ.
Ran MS Window Memory tester and also had errors, Dimm_1 showed 7 errors. I switched my memory modules (2X512)from 1 to 2, vice versa and ran the tests and it also resulted in failed tests; is it possible that both sticks could be damaged or is it because of the dual channel that it will show errors in Dimm_1? Luckily I had just received my 2 sticks of new RAM and replaced the Dell Branded pair, and what do you know I ran memtest86+, MS Windows Memory Tester, and Dell Diagnostics and everything was now error free. I have to run a test on each Dell Branded memory stick and make sure they are both damaged so that I can send them back. Thanks for the help Peter.
The best way to check each stick is to test them independently, but you could also have errors that only appear in dual channel mode. Sounds like it might be a good idea to return them both if there is any question.