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Polaris Bios Editing ( RX5xx / RX4xx ) - Page 99

post #981 of 3408
Is there any explanation about what those entries in "FAN" and "Powertune" doing exactly?

Specially the difference between TDP and Max Power Limit or the hysteresis value, Min/Med/High Temp etc.
post #982 of 3408
Help me guys. I bought XFX RX470 single fan XXX 4GB and I modified bios number 2 only by changing the timings as I saw it in a video that used the same memory chip and same VGA and I made the flash. But restarting the computer to bios number 2 does not give video and does not boot even with another onboard VGA card. I only managed to boot adding another offboard board in the total of 3 counting with the onboard. I was able to flash but it still does not boot. With bios number 1 everything works normally.
post #983 of 3408
Quote:
Originally Posted by Chaser View Post

Is there any explanation about what those entries in "FAN" and "Powertune" doing exactly?

Specially the difference between TDP and Max Power Limit or the hysteresis value, Min/Med/High Temp etc.

PowerTune values relate to GPU on PCB:

TDP: "Change TDP limit based on customer's thermal solution"

TDC: "PowerTune limit for maximum thermally sustainable current by VDDC regulator that can be supplied"

Max Power Limit: "This power limit is the total chip power that we need to stay within in order to not violate the PCIe rail/connector power delivery"

Fan section in Polaris bios editor does not show fan mode (plus some other values). There are 2 types of fan mode Lookup table (LUT) and Fuzzy Logic (FL). From what I have seen Polaris factory ROMs use FL.

Basically LUT uses Temp.Hysteresis and the 3 Temp/PWM values (Min,Med,High). FL uses Max PWM%, Max RPM, Sensitivity and Acoustic Limit (MHz), then also FL mode has it's own Target GPU temperature value which is not shown in Polaris bios editor (plus there are other values).

In Hawaii bios mod OP is info on Temp.Hysteresis, heading How to edit Temperature Hysteresis for Standard Fan Mode (LUT).

If using Polaris bios editor you don't achieve a fan modification as you require open a new thread in the context of you modification and I'll share what information I can smile.gif .
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XPS - R7 1700
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XPS - i5 4690K
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post #984 of 3408
Quote:
Originally Posted by gupsterg View Post

PowerTune values relate to GPU on PCB:

TDP: "Change TDP limit based on customer's thermal solution"

TDC: "PowerTune limit for maximum thermally sustainable current by VDDC regulator that can be supplied"

Max Power Limit: "This power limit is the total chip power that we need to stay within in order to not violate the PCIe rail/connector power delivery"
...

So, with my RX 480 Nitro can "safetly" set:

TDP and Max Power Limit to 225, 75 watts from PCI-E connector (from motherboard) + 150 watts from 8 PIN power connector. Since some more power can be drawn from the connectors, 225 watts should not be "a wall that should never be climbed".

TDC to 190 A (from 124, theoretical max should be 200), here is where I'm a bit unsure. From here: http://www.youtube.com/watch?v=EPwsLOX7Y_k&t=4m50s you can see that 200 A is the max that can be supplied, I chose 190 just to avoid the theorical limit.

Am I right?

Also, is 1150 the maximum safe value for mem voltage?

Is there a way to set a minimum fan spin value by bios mod? (Rx nitro has a "zero fan" thats hurts temperature)
Edited by Vento041 - 11/14/16 at 5:58am
post #985 of 3408
Sorry Guys for disturbing, but is there any way to contact the developer of POLARIS BIOS EDITOR or a way to get the complete Source Code for it? Nut just the published Infos on GitHub? For CLOVER Bootloader (http://insanelymac.com) we need the info, where the hell to find Memoryposition for VRAM initializaltion.

Sorry, could not better describe what kind of info we are looking for, cause i am NO real coder. But source code of PBE would might us help, get POLARIS VRAM initialization to work properly with CLOVER bootloader. It has to look something like this:

#define R600_CONFIG_MEMSIZE 0x5428 <--- Value for old RADEON CARDS

Currently we think, it should like this:

#define POLARIS_CONFIG_MEMSIZE 0x0150a <--- Value, we are looking for POLARIS

but this seems not to work, so now we are looking for the correct register and Developer or Source Code of Polaris BIOS Editor might help to fin the correct info. Any help appreciated.

Regards... Mork vom Ork
Edited by Mork vom Ork - 11/15/16 at 1:54pm
post #986 of 3408
Hello guys. I need some help, at least to understand one thing. My english is not that good, so hope you understand.


I manage to copy and see from anothers Bios and do my Modded Bios.. It's everything working well. Got also a modded Air Cooler so everything is fresh.. VRM's max is something like 63º.... GPU is like no more than 67 degress..

I just want to try out the 1400Mhz, but dunno why i got those numbers on the different Stages mV ( 65288 )

There is another way to place the Voltage manual? Like we do under Wattman? Or i can just for example on the last Stage under Polaris bios Editor write for 1100?

post #987 of 3408
Set every single voltage manually. Eg: 1150mv for all.
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post #988 of 3408
Quote:
Originally Posted by Xcat2008 View Post

Hello guys. I need some help, at least to understand one thing. My english is not that good, so hope you understand.

I manage to copy and see from anothers Bios and do my Modded Bios.. It's everything working well. Got also a modded Air Cooler so everything is fresh.. VRM's max is something like 63º.... GPU is like no more than 67 degress..

I just want to try out the 1400Mhz, but dunno why i got those numbers on the different Stages mV ( 65288 )

There is another way to place the Voltage manual? Like we do under Wattman? Or i can just for example on the last Stage under Polaris bios Editor write for 1100?


Those numbers are normal. Since AMD cannot finetune the voltages for every DPM of every chip, they instead put voltage pointers (the numbers you're seeing) relating to a voltage offset that is determined by the leakage current characteristic of the ASIC.
This way, AMD can set stable voltages for all cards without testing one by one.

It is best to leave them alone and play with voltage sliders of software utilities like Afterburner or TRIXX. The +100mV from AB are already plenty to achieve high overclocks, let alone the +200mV from TRIXX.
Edited by Ansau - 11/15/16 at 2:34pm
post #989 of 3408
Thank you for the reply thumb.gif

I just wanna Overclock via Bios, no progams like MSI or WattMan.. Using Msi only to see the Temperatures and stuffs..

So, if i apply 1400Mhz in the Last Stage, the Card will self adjust the voltage?

This is the ASIC of my card..
post #990 of 3408
Quote:
Originally Posted by Ansau View Post

Those numbers are normal. Since AMD cannot finetune the voltages for every DPM of every chip, they instead put voltage pointers (the numbers you're seeing) relating to a voltage offset that is determined by the leakage current characteristic of the ASIC.
This way, AMD can set stable voltages for all cards without testing one by one.

It is best to leave them alone and play with voltage sliders of software utilities like Afterburner or TRIXX. The +100mV from AB are already plenty to achieve high overclocks, let alone the +200mV from TRIXX.

But if I want to go under 800mV I can only do that with BIOS editing?
btw. can I set those mV down to where I want (for expample 500mV) or is that a minimum that the card needs to operate?
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