Talan,

Thx for that register dump.

Now try this one.

Link

Flash it, completely shut down your system (Turn off the electricity!), completely remove driver (DDU), reinstall driver, remove Afterburner profiles, run afterburner and slightly go down on the core voltage (steps of -6mV)
This one has -75mV VDDC and -75mV MVDDC. so basically you can still go to -100mV if you lower your core voltage in afterburner to -25mV. Your system will be already booted and won't be going crazy like it is right now.

If this works, let me know, i'll lower the memory voltage until you hit the sweet spot.


For all you other guys out there.

Here, R9390Nitro With Backplate modded rom that i'm using.

This rom will make your nitro into a power hungry beast so please be careful.
First run stock clocks(after the flash), if it's ok, raise your core voltage with little steps (+6mV).
DO NOT flash this rom on any other R9 390 brand. It will definitely screw it up!
So ONLY R9 390 Nitro with backplate. 


Link


Also.

This is a modified bios. Yeah...
This will void your warranty.
I am not responsible for a failed bios flash or damaged card resulting in the usage of this bios.
By downloading this you are agreeing that you take full responsibility for using this bios and hold no liability to me or this site.
If you feel uncomfortable, than don't.
If for some reason you do brick your card, because you probably didn't read my instructions to careful :p and you can't afford another one, than don't..
If you're happy with everything as it is right now, than don't.
If you're like me, and you want to get the most out of your GPU's. Than yeah. go ahead..
This goes for every bios i share.


Greetings!