Do you have a before comparison with the your original/old BIOS? I'd really like to see same clock settings in a side by side comparison for these different BIOS. Also which driver are you using?
The feedback in here is very nice, overall it seems like the new 390x BIOS is either providing the same or better results than stock BIOS.
I just did a quick bench of my best 290, 13194 graphics score, http://www.3dmark.com/3dm/7831313
That's on air, 1170 core, 1600 mem, +100mv, +50 power. It was artifacting but not enough to crash lol (AMD 15.7 driver)
Actually this card had PT1 BIOS when I got it, just flashed that sapphire BIOS posted in here so I could get some sensors back and also so it would downclock as reference should. Under water (previous owner) this card has done much higher clocks during benches, so I'm looking forward to testing it further when I put it under water again.Edited by Faster_is_better - 7/20/15 at 12:16pm