I just finished trying my old ram in my new desktop. With both stick installed the computer wouldn't boot. Then I tried one stick at a time to see which one was bad. The computer wouldn't boot with either one of them. Looks like I can buy new memory sticks for my new desktop and use the 4GB stick for my old PowerSpec desktop and retire my old HP desktop. Seeing that it looks like I found the problem I'm going to go ahead and mark this as solved.