A good number of power supplies do run with no load, the latest A4 Neo HE among them. .. Invariably, boosting the load on the power supply fixes the problem.
Sorry to dig up this old thread. I bought an Antec NeoHE380 for use with an ASUS M2NPV-VM, one ODD and one HD, one case fan, and a VFD. I had seen this thread before, but was under the impression that Antec had fixed the problem, and assumed that this much later only newer revision PSUs would be in the supply chain. My bad. When installed, the motherboard LED would light up, but when I turned the system on the fans would spin for a split second, then everything would shut down.
I recalled this thread and figured this sounded like a similar problem. I plugged in a fan and when I ramped it up to a pretty high speed, the system POSTed. The Antec was an A3.
I opened a ticket with Antec but didn't feel like spending the money to ship it back to them.
Fortunately, my store took the PSU back. Because of the physical constraints of my case (low profile HTPC), I need a PSU with straight-through air flow. The only other PSU my store had was a 500W Antec which seemed like overkill for this system. My case is cramped so I liked the Neo because of the modular cables, high efficiency and reputed quietness.
- do all rev A4 Antecs run with low load now ? Does sleep mode work properly on all of them ?
- do the revision #s hold between different sized Antec PSUs ? i.e., would a rev A4 380W have the same fixes that an A4 430W would ? I prefer to stay with a 380W, would even go down in size, but if I have to, I am willing to move up in size to fix this.
- is there any way to tell what revision a PSU without opening the box ?
- alternatively, can some kind sould recommend a different PSU that will work with a low power seutp, has straight-through airflow AND is quiet (and preferably highly efficient)?