I got Sapphire Nitro 6800xt SE, Getting 64.3-64.7mhs, no bios mod but runs 172w.
Core 1500, Mem 2150, custom fan curve. Temps range from 48-52c, junction 58-60c.
I want to do the bios mod but I do game a few hours most days not sure if I can do that with lower voltage?
The other thing is if my card isnt running 170w+ then my hash goes to crap ie 29mh/s at 160w.
Basically atm I have to keep core around 1500 or it goes lower voltage and kills my hash.
Are you sure that's the exact power draw of a rx6800xt or you are telling us what your mining software is displaying? Get yourself a wattmeter and see the actual wattage that rx6800xt is pulling from wall because I can bet with you that it's more than 172wattCore 1500, Mem 2150, custom fan curve. Temps range from 48-52c, junction 58-60c.
I want to do the bios mod but I do game a few hours most days not sure if I can do that with lower voltage?
The other thing is if my card isnt running 170w+ then my hash goes to crap ie 29mh/s at 160w.
Basically atm I have to keep core around 1500 or it goes lower voltage and kills my hash.
That 172w is what Phoenixminer was saying, I know thats not the same as at the wall. Just tried bios mod finally got it to 625mv (didnt bother going lower).
So now it is 64.6mh/s and 137w in miner. I also tried changing ram speed but it wouldnt even do 2mhz more without crashing.
Pretty happy with the about 20% less power usage thou. Runs 5c cooler, should of done this much sooner.
Original bios file from here https://www.techpowerup.com/vgabios/?architecture=AMD&manufacturer=Sapphire&model=RX+6800+XT&interface=&memType=&memSize=&since=
Morepowertools here https://www.igorslab.de/en/red-bios-editor-and-morepowertool-adjust-and-optimize-your-vbios-and-even-more-stable-overclocking-navi-unlimited/3/
The highest that rx6800 can do is around 60mh to 64MH so you aren't that far behind, try finding different core and memory settings and start using MSI afterburner to make some adjustments and see which one works for you