I did try changing the clocks and voltage in wattman but they didn't apply. Just hobbled the clock speed as before.
No, forget wattman once you start using MPT, even cause wattman does not work. It might if you only change gpu freq and voltage, the momento you touch mem clock it goes messy, and the other way around as well.
The tab Features you don't need to use it would be handy if you could rely on wattman. Same for overdrive limits. Fan depends on what you want and if you have you card on air, if is on water don't bother changing anything there.
You need to focus on the power and voltage and frequency tabs.
What MPT does, it basically manually input the value you want in the registry, alternatively you can use the premade .reg files we find around forums, but I'd stick with MPT.
So open it and load you bios (previously dumped from your card using gpuz), go to frequency tab and set there what you would set in wattman - gfx maximum and memory dpm2 is what I change here, that's it. gfx minimum, soc, all the other memory DPM I leave as it is. In the power and voltage tab set maxium voltage gfx, and power limit gpu if you believe this change anything (I don't think it works but....).. And that's it.
If you used any regfile before loading the bios is not necessary, you will be able to change the values in that way.
You dont need wattman once you are using MPT, I leave wattman on auto and don't even open it, as it might mess the registry entries. All the other options on power and voltage and frequency tab depends on what you want.
these are my settings, for example,
A very helpful figure came out of Steve at Gamersnexus. For ever -10c in temp = 4% power saving. What i'm trying to say is are you running out of power? I run my card 1800@949mv 1140mhz HBM standard power. My default core mv is 1063 so quite low. 1900@1000mv is the sweet spot but uses a fair amount more power for 100mhz. The 7nm process is very good until you take it out of its efficiency curve. 100mhz costs around 30w extra in my setup. 1800mhz uses 160-170w due to the low leakage with temps 32/60 when my loop warms up.
What's your default voltage?
That's a good question, power. From the wall both cpu and gpu under load it draws around 350W, my psu is a rm805x, so there's enough headroom.
My stock voltage is 1080mv, if I check from wattman voltage curve, but, if I leave the card totally stock and run any load, the voltage displayed on the OSD is 1118V, weird.
One thing I mentioned before about this is, even if I set all stock, and turn both pump and fans down, I'll face the same problems once I start breaching 85C in the JT. So, default power consumption, and same issue, so I assume I'm not running out of power.
I've done a check on those sites where they calculate the whole consumption, I included every bit of the rig, even oc and voltages, and tops up around 450W.
What I really wanted to do, as a sane check, is to put the original cooler back. But that it too much, I'm not willing to do that. I rather use it with fans on 80% to do not get around 85C in the JT, or just run it at 1950/1095mV.