Ok so it was just exe file to run.
I first did a backup of old driver from GPUz then ran it and it went smooth.
Got update to L09, base clock increased to 1820 and is stable at ~940V (crashed at 920) with tomb Raider.
One impressive thing though me temps went down by atleast 12-15...
Yes mine is same as yours.
I can't find any details for bios in Asrock might have to contact them.
Fo high end games like tekken 8 gpu does seems to crash when undervolting to ~890
Thank you for input guys but a bit late.
I went with my posted build and it costed me 43,900.
Now the antec case has 3 front fans but no exhaust fan. Should I get exhaust fan? If so how many? I'm thinking about positive since it is better against dust.
Currently while playing tekken 8 my gpu...