Ordered on 32 gb set, then decided on getting a second one. The second set ended up being only 16gb. Amazon replaced it, easily. But, I am getting Blue screens of death. Ran diagnostic and it said I had bad memory module(s). Don't know how to figure out which one(s). Now, have you ever tried calling Amazon, lately? I certainly cannot find a contact number to discuss the problem, and work out a solution. For example: do they want to replace ALL of the RAM?