When I had originally rebuilt the system I used the 450w PSU, plugged everything in and it wouldn't post. I shut it down, then started it again...and it would start, and wind down, and go off....then 2 seconds later it start up...but again, no post. So I figured the 450 PSU wasn't enough power. I unplugged a fan, still nothing, unplugged another fan...same issue....finally, I unplugged the CD drive and it posted and worked fine. I ordered a 650w, replaced the PSU....and guess what....SAME PROBLEM....I am at a loss. I admit the 650w that I ordered is pretty cheap....light and was only 20 bux. I don't know if I should order a more reliable brand. So this is why I am asking for help. Anyone out there that can help me figure this out? Am I missing something? It runs fine ...so long as those fans and the CD drive are not hooked up.
The 650W unit has 35A on its 12V rail, your old 450W unit had at most 31A on the 12V rail but likely only 29A combined, so your 650W unit isnt much stronger than the old 450W unit. Replacing a low power PSU with a crappy PSU does not help to solve power supply problems, especially one that cheap that likely cannot do that power level for more than a couple seconds. Get a good one from Seasonic, Antec, Corsair or OCZ, that will at least rule out the PSU being Crap as the source of the problems.
I just thought of something that totally slipped my mind. I have a card I added to give me an extra IDE connector for my CD drive since I am using 2 HDs. The card seems to work, the drive works fine...however, in the Device manager it shows that there is a PCI Simple Communications Controller, but it has a yellow triangle with the "!" on it. I never bothered to look into it...could this be the problem?