I ran a test on my pc.  The 5830 and the sapphire 5850 ran stable without the asus 5850.  however, when i started the asus 5850 the M/hash began to fluctuate.  So it seems my psu can't handle all my cards.  however, I was able to run it for a week and my psu handled it fine.  When i overclocked the asus 5850, could there be any settings left over that allowed it to draw more power?
thanks