How about this set of tech details

msi 470 4gb with hynix ram

xmr rom  for max  h per  watts.

I can sit down and learn to do a custom rom.

  but  I simply want  details like what is best result  on the msi rx 470 watt per hash.

So I can decide if it is worth my time to do it myself.

What I never see is   watts per card per h .

I have no need to do anything but under clock + under volt

Basically I want to know  what would a msi rx 470 4gb gaming gpu will burn in watts at 500 h    not what it burns  when mining at 650h   or 700h

 I read all the info on  overclock and undervolt.

 I want  info on underclock and undervolt.  

I know what I can do with  manual settings  and I can do

500h  550h 600h and 650h  all manually with not much effort

so  what does an msi rx 470 do with a custom xmr mod?

I have 28 rx msi 470's  doing xmr    They run at about 500h with stock rom and a simple under clock at simplemining.net
I can alter the underclock to an overclock.
I can run with windows but frankly  is it worth it to me to spend the time to do a better rom tweaked for low volts and under clock?