Your psu should have a maw output rating listed on it. I did a little more research and I think that psu has a rating of 34A max. From what you found the required amps are 40A for the 285. This makes me think you may not want to try it. That's my opinion though. There are a few guys that really know their stuff about psu's in these forums. Hopefully, they will chime in. They certainlu would be more of an authority on the subject than me. Not that I'm an idiot, I just don't want to steer you wrong one way or another.