I can check your Bios Original & your Bios Mod if you share 
Card is loaded ok. You have just a bit of mem tweak available there since its 98 and not 100%.
Dont use molex to power cards it will melt. If it crashes with my settings then something is of and good that you lowered them. Whats the hashes you get with the used settings .
As i see your settings are not bad. You can try to raise the core clock to 1100. Then the core voltage to 900 to reduce heat. Even 850 might be ok for your card. The you can try the vddci memory controller voltage 850 or 800. This will reduce the heat more. And then you can try with a bit higher memory clock.
Here this is my stock bios that I downloaded from HiveOS: https://drive.google.com/file/d/17Wsr6VnjR1qps8GsGGfBedBgRa-H0q7q/view?usp=sharing
I can not upload directly here. Thanks.
https://mega.nz/file/ChpBQQTb#pERPiu2kNb3VH1IhOEv6QZF6Di2b05uLyiFwL_ZfVZs
Modded Bios 
Try with my setting & try other setting
Hi, many thanks for your efforts Kenshinji. I flashed the BIOS you provided. But it kind of got worse, it is mining with some OC but 1/3 of the shares it finds is invalid or it is not mining at all. I am sharing some screen shots with different OC settings. Last screenshot is from rkulov’s setting that given in 3rd comment. Also I tried your settings but it still did not mine. It starts mining with 20+ mh/s it increases but suddenly drops to zero.
I dont have same setting.
Try Core 1150 - DPM 1 - VDD 850 - MEM 2000 - MDPM 1
Ref 30
I did tried this, same happens. It starts mining but few seconds later it goes to 0.00 mh/s
Look. Try again . Get the original bios and bios mod it with one click mode. Use uber 3.1 then upload it and use my setting or start with 1100 core and 2000 memory. Dont use dpm states. Insert 800 volts core and memory. If it crashes. Increase core volts to 831 and start raising the core votlage by small and memory. First raise memory because core clock and voltage increases wattage and heat much.
ok remove MDPM & DPM set 3
Are you sure you powered the cards correctly? They need to be powered from two places. One place is the riser and the other is on top or side of the card itself. They cant be running with 40 watts consumption…
This is after rig crashed.
unfortunately, this did not worked too. It started mining with 18 mh/s, suddenly dropped to 0.
Forget about dpm states really. If you set core voltages you dont need dpm states. You got it working with stock bios before. My settings didnt work for you because it wasnt moded. After the standard mod that i told you with PBE you can test them again. Or put a little lower clocks and start from there
its very strange because i use thats
and
Thanks guys for helping me at Friday evening. I gave up for today, will continue tomorrow. It is hashing 26 mh/s with stock bios with no problem now. I will inform you with trying different settings and ubermix.
Uber mix is for samsung i saw you have micron. They also have good straps but i think they start low from 1500 up. Try with the standard mod the PBE makes and use my settings or a bit lower clock and memory. Good start should be 1100 core and 2000 mem. Try with 850 850 voltages core and mem. Then if all works well try tweaking them.
Thanks guys for helping me at Friday evening. I gave up for today, will continue tomorrow. It is hashing 26 mh/s with stock bios with no problem now. I will inform you with trying different settings and ubermix.
I have sold the card (rx 470) and bought gtx 1660 at the same price. As I know GTX 1660 with samsung memory can do max 25 mh/s, which is what I got right now. If it was hynix or micron it can do 27-29 mh/s as I know. I am currently mining at 25 mh/s with 50 Watts. I think it is not a bad deal.