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Polaris Bios Editing ( RX5xx / RX4xx ) - Page 107

post #1061 of 3394
I might be able to get RX 460 Nitro which requires additional power supply and won't even turn on without additional power, can a custom BIOS be installed to make it run off of PCI-E slot?
Edited by sepiashimmer - 12/9/16 at 5:31am
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post #1062 of 3394
Quote:
Originally Posted by sepiashimmer View Post

I might be able to get RX 460 Nitro which requires additional power supply and won't even turn on without additional power, can a custom BIOS be installed to make it run off of PCI-E slot?

Don't get a card you can't run out the box. Because you will likely need trial and error, if it's even possible to achieve.

You'll first need to find the offset for the VRM's, and make it use 100% PCI bus. WattTool can do this, but I know the 460 for the most part is not compatible with the bios editor and watttool as they use a different chip. But if you can get those to work, you may be able to test the load shifting in watttool, and see if you can't apply it in bios, use the editor to simply give it a sig to flash it. But there are likely early post checks that always load default, so you likely will have more than just one offset to adjust to achieve what you are planning.

If you are doing it for the challenge, do it. But if you are doing it because you can get the card, but can't run it without that, then don't, and get one designed for it.

If you do get it and are successful, post it here, as I'm sure many people will appreciate it!
post #1063 of 3394
Quote:
Originally Posted by jeb101 View Post

Don't get a card you can't run out the box. Because you will likely need trial and error, if it's even possible to achieve.

You'll first need to find the offset for the VRM's, and make it use 100% PCI bus. WattTool can do this, but I know the 460 for the most part is not compatible with the bios editor and watttool as they use a different chip. But if you can get those to work, you may be able to test the load shifting in watttool, and see if you can't apply it in bios, use the editor to simply give it a sig to flash it. But there are likely early post checks that always load default, so you likely will have more than just one offset to adjust to achieve what you are planning.

If you are doing it for the challenge, do it. But if you are doing it because you can get the card, but can't run it without that, then don't, and get one designed for it.

If you do get it and are successful, post it here, as I'm sure many people will appreciate it!

Thanks a lot. REP+

I'll research more and see what I can do.
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post #1064 of 3394
Anyone have an idea why the MSI Gaming X bios is set to 180 on TDC and 180 on Max Power Limit on the stock bios, could this be the reason the cards power draw spikes and is so high.
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post #1065 of 3394
Power spikes are from too much vrm temperature. As temperature rises, electrical input resistance increases therefore requiring higher input to yield acceptable output. If the vrm temperature was never to exceed 75C, or more like 45C then input would be near output. Ideally 1:1 input/output ratio is ideal for proper efficiency, longevity, and performance. thumbsupsmiley.png
Edited by chris89 - 12/10/16 at 11:44am
post #1066 of 3394
Well my Gaming X VRM temps don't go over 80C and it still spikes so I'm thinking it can't be that, which is why I'm thinking its the bios.(or a very poorly binned gpu)
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post #1067 of 3394
Same from my Gaming X, and i've seen ppl with both a Gaming X and a XFX GTR that say that power consumption on the wall is equal on both despite the Gaming X reporting way higher power consumption and those spikes... So im pretty sure its the bios...
post #1068 of 3394
I know I had that power spike issue on my sapphire 380x, vrm was too hot even know whatever temp sensors said if there is a vrm temp sensor on rx 480?

I'm sure the reference cards don't have this issue with the rx 480 cooling plate. More surface area means way less likely to saturate, unlike the little 1/4" x 3.75" or so short small vrm heatsinks on non reference cards. That plate makes all the difference for actual stable gaming at high clocks and voltage.

Am I correct to say that you cannot increase the base voltage in the bios of these cards?

If so, may some help me increase the base voltage? RX 460, here.

I looked around the BIOS in hex, but its much different than Tonga that I'm used to. Ran across some values in sequence like 02 FF, 04 FF, 06 FF, 08 FF which is sort of relevant... I'm unsure because I know the stock base voltage is 1150mv and the VDDCI is 900mv, that's -200mv which is 37 FF from factory. If I increased the base voltage to 1250mv, and kept the -200mv (900mv) VDDCI it would be A1 FE @ -350mv offset VDDCI...

Any advice? Or is it that no one knows? Thank You
post #1069 of 3394
Quote:
Originally Posted by VxTuga View Post

Same from my Gaming X, and i've seen ppl with both a Gaming X and a XFX GTR that say that power consumption on the wall is equal on both despite the Gaming X reporting way higher power consumption and those spikes... So im pretty sure its the bios...

what is yours spiking to, mine is spiking over 300+ with no extra voltage

also trying to turn change the zero frozr temps in the bios, I know the temp to turn on the fan is 59 or 60 but it seems the turn off temp is 56/57 and under.
Edited by KainXS - 12/11/16 at 10:52am
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post #1070 of 3394
To resolve this issue without physical tampering. Within Polaris Bios Editor, adjust all max temperatures in the power field area and thermal field area to 88C.

By measuring the temperature on the back of the pcb at 89.5C, it's clear that 109.5 to 110C is accurate as that would reflect the max allowed temperature in Polaris Bios Editor. It's under hot-spot in the power field area. I set all mine to 88C on ALL of the hot-spot/ max temp/ etc areas. This means that the regulator or hot-spots themselves will not be allowed to exceed 88C, that means measuring by thermal imaging would yield roughly 20C less than 88C... 68C... This will allow much-much higher efficiency and not all the massive power spikes to occur through thermoelectric dynamic resistance.



Edited by chris89 - 12/11/16 at 11:19am
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