Thanks for the response! Good thing I don't currently rely on my server being up, so I'll be keeping it turned off until I get around to getting new RAM sticks. But, just to make sure I'm understanding this correctly, only the stick in the first slot ( DIMM 0) is throwing an error, correct? And if so, if I took that stick out and moved other 3 sticks to their appropriate slots, everything should be able to run fine correct? I've got 4 8GB sticks in now, but I can probably get by with running just 3 8GB sticks, or even just 2 sticks, for a little while.