Try the following quick checks:
- reseat RAM and ensure using blue slots first before the gray DIMM slots, also do #2
- make sure CPU fan working correctly (2/3 pins are much more common now) and reporting status
Then try this, failing the others:
- test CPU temperature, 95 degrees Celsius is usually auto shut-off for AMD CPUs
EDIT: 5/20/2015 -- My above answer is woefully incomplete, for which I apologize.
In 2004 one of my clients was having almost the exact same problem as you have described in terms of symptoms, except they were using a . After doing my best to troubleshoot the problem, and failing to find a solution, my client exchanged the DOA motherboard for another Soyo Dragon II.
That motherboard had the exact same problem, and I was out of ideas, so I took the whole darn rig to my Mentor just down the street. Within only a few minutes he pinpointed the problem as being faulty capacitors on the motherboard, which he determined by comparing voltage and amperage readouts to what the motherboard manual listed -- http://www.NewEgg.com responded promptly with the unfortunate news that the entire production run of these Dragon II motherboards had bad capacitors (they then, free of charge, shipped my client via overnight air a similarly eComStation compatible motherboard that was at least 3 rungs up the ladder from the Dragon II).
I strongly suspect it is an issue caused by your motherboard, more specifically its DualBIOS feature somehow reporting false positives. This link gives you the run-down on its specifications and reviews from other users with essentially the same problem: http://www.newegg.com/Product/Product.aspx?Item=N82E16813128423
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/andrew_7b5641a71b84cd85