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[Official] Polaris Owners Club - Page 71

post #701 of 4363
You can use Afterburner or the VRM Tool with command line options and have them auto-run at startup to configure the VRM.

This is only a stopgap solution for me, after there is a better workaround for BIOS signature enforcement I will be flashing the BIOS to disable the power limit.
Edited by KarathKasun - 8/19/16 at 9:46am
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post #702 of 4363
Quote:
Originally Posted by BromoL View Post

My observation with p-state switching is the following. GPU frequency varies in much smaller steps than p-states but VID takes only values from p-states. So your voltage is a step function while frequency is smooth. My last two p-states are 1235MHz@1.006V and 1265MHz@1.025V. If I adjust the power target to get minor throttling, the VID is not reduced until the GPU-frequency drops below approximately 1250 MHz. So the voltage from a given p-state (1.006V) must be sufficient for frequencys up to the average with the next higher p-state (1235MHz + 1265MHz)/2 = 1250MHz. If I overclock only the last p-state to 1300MHz@1.056V the GPU becomes unstable because 1.006V is not enough voltage for (1235MHz+1300MHz)/2 = 1267MHz. The same could happen with all p-states at max OC. Lets take again 1300MHz@1.056V. Then the idle voltage would be used for frequencys up to (300MHz + 1300MHz)/2 = 800MHz. Under (my) stock settings 800MHz would run with 0.825V instead of 0.8V. For the lower p-states this only applies, if memory stays at 300MHz, because otherwise the "memory voltage" is used.



I could be wrong and the monitored frequencys are some averages (so 1250MHz could be 50% at 1235MHz plus 50% at 1265MHz). But then i should get some readings of lower VIDs while throttling in the 1250MHz to 1265MHz range, which is not the case.

This could explain why I do better going a little higher than I should need on the intermediary states, especially state 6. If I set state 6 for just what's stable for that speed at state 7, I'm less stable moving from state 6 to state 7. I do better if I set it a few mv above. Your observation may explain why. Thanks.

I hope reference cards become available again soon. It's looking more and more like the Rise of the Tomb Raider issue I've been seeing is a bad block on my vmems. I'm thinking of getting a second card before I attempt to rma with Sapphire. After the rma I'll crossfire I guess. I don't really have a need for that much performance right now, but I can't be without my system for weeks. We'll see. I ran a bunch of compute tests on the video card and they all passed but the Rise of the Tomb Raider issue just looks like bad vmem. I'll try to get more proof before approaching sapphire.

edit: Here't the glitch in Just Cause 3's menu. It's the only other place where the bad block shows up. It again looks just like bad vmems to me. http://imgur.com/a/4inCM In game is fine...it's only on the title screen.

This was one of the first games I loaded, I should have RMAd the card when I first saw this issue, but I figured it might be a driver glitch. No one else seems to be having it though.
Edited by greytoad - 8/19/16 at 10:21am
post #703 of 4363
If you are using RX 480 - You can disable the power limit with the Unlocked Bios, its not a real disable, but the power limit go to 150%
post #704 of 4363
Just joined the club and the site.
I'm looking forward to see how far i can push this card.
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post #705 of 4363
Quote:
Originally Posted by Jboptical View Post

Just joined the club and the site.
I'm looking forward to see how far i can push this card.

RX480 - deppends on the cooling - But with a good one, easy 1400 mhz for GPU and 2150 for mem - Then its just try and fail, and have some luck.-
post #706 of 4363
Quote:
Originally Posted by GecKoTDF View Post

If you are using RX 480 - You can disable the power limit with the Unlocked Bios, its not a real disable, but the power limit go to 150%
Isn't that only for reference cards with the specific VRM IC?
post #707 of 4363
Quote:
Originally Posted by JackCY View Post

Isn't that only for reference cards with the specific VRM IC?

I didn't use the BIOS, but I use the VRM tool previously mentioned a few posts back with my XFX RX 480 GTR as it uses the same IC. thumb.gif

Also, I'm convinced this thing has an RGB LED, as it has four wires to the LED, so I may try to figure out what IC controls that, if one is installed, and get to setting that LED to the nice blood red my system is dying for... also ordered some red brake light tint just in case that doesn't work, as well as firing off an e-mail to XFX Support to see what they say.
post #708 of 4363
Quote:
Originally Posted by JackCY View Post

Isn't that only for reference cards with the specific VRM IC?

Don't think so because you are doing that from bios, editing the power tune max power.
post #709 of 4363
Are you talking about http://overclocking.guide/download/amd-radeon-rx-480-unlocked-air-bios/
or are you talking about embd 1.1 r2 from TheStilit?
post #710 of 4363
The http://overclocking.guide/download/amd-radeon-rx-480-unlocked-air-bios/ - I use that for my RX 480 and never have a problem with power draw - And i check it in the Polaris Bios Editor and the only change have its the max TDP in power tune AKA Wattman now.-
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