I can´t get more than 62,xx mh/s with this settings on my MSI 6800 XT, so I switched back to my settings.
I can get my MSI 6800 to go to 92w and 62.8Mh but I have 3 Asus tuf gaming Rx 6800 that with the same settings they just fail.
Does anyone have the same cards and fixed the issue?
My settings are 1350 Core clock
650 VDD /750 VDDCI/1250 MVDD
1070 memory clock
Hey there!
Try my settings from above! They seem to work on most cards!
Are you measuring the power at the wall? You’ll find the values posted quite a bit off in nearly all cases and can only be used for guidance. Fan speed adds a bit of power consumption too, so board design matters. Silicon lottery matters.
Here is a mix of my lowest to highest to keep them stable at 62MHs in TRM:
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did you change anything on soc freq or soc vddmax ?
I though every card could be under 100. my bad . u right I forgot the silicon lottery 
.708 efficiency
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Update on my rig. Total hashrate is at 439.1 MHs with a power draw of exactly 800 watts. Using GMiner v2.7.0 and HiveOS v0.6-210@211010 (I’m choosing not to update for now).
You’ll see invalid shares aplenty but this rig has not been restarted for 18 straight days now. Acceptance rate is pretty good, better than when it was on Windows (was at about 98.15%). The miner restarts every 3-4 days or so because of my autofan settings. Ambient temperature in the room is about 32-35 Celsius (depending on the time of day).
Hope everyone else is finally getting to their sweet spots. The 6800’s are great cards for mining. Have fun!
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I noticed on my system when I apply overclocks after a reboot, the power draw from the 6800s drops like 5-10w in software and verified at the wall. The hash rate doesn’t change. This drops about 30w at the wall for me typically for my 3 6800s. The overclock change can be as simple as adjusting 1 fan and doesn’t have to be on all cards.
Does anyone else observe this or know whats going on? It would be great if it can do this without me needing to re-applying overclocks.
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I got same situatiom as you, when reboot the amd-info show 750mv at 675mv core clock voltage, if applying any overclock simple as you said the fan percentage it will be droping to 668mv at amd-info. This happen after the F state version update, if downgrade to previous version it will be back to normal reboot startup with 668mv amd-info without reapplying any oc.
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Which previous version do you use?
I have also experienced this exact issue. Each time the rig is restarted for whatever reason, I change the SoC VDDmax, mV from 800 to 801 or other way around, just to get the 10w drop on the cards
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hiveos-0.6-210-beta@210914, but you will lost the F state advantage. My sapphire rx6800 cant seem have other way than manually reapplying overclock with F state advantage version to get lower wattage or just leave it at high wattage, without F state advantage its only manage to get 58mh.
What vbios are you using?
the hiveos wattage reporting for amd cards is way off, so dont have to worry about hiveos, more about at the wall. hiveos shows 410w, but at the wall is 640w. using a corsair ax1600i, g4400, 8gb single stick, 120gb ssd and 4x 6800xt. no additional fans or accessories. sometimes when all the cards are showing 110w usage each, the wall is still at 640w
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