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Polaris Bios Editing ( RX5xx / RX4xx ) - Page 131

post #1301 of 3314
Quote:
Originally Posted by robnitro View Post

Chris, you're onto something. I was looking through the higher power stock bioses by Powercolor and Sapphie RX480s.

They all keep TDP(w) at 110.
The TDC (A) is usually around 82-84% of the
max power limit

Stock 110 107 110

one was 110
120
140
another 110
122
145
another 110
124
150

I'm an electrician (technical side), so I know there is a good correlation.
Watts is Volts X Amps if we ignore inductance/capacitance.

So, let's say your stock card was set up as 110w/107a . They are figuring you are running the stock voltages, which are lower.

But let's say you increase voltage from 1.1 to 1.2v, that is a 10% increase in voltage, meaning 10% increase in current.
BUT, wattage goes up 1.1 x 1.1= 1.21 or 20% if both current and wattage are allowed to increase.

Easier example:

So, if we had settings of 150A and 150 W

1.0v X 150A is 150W, under/equal TDP.. ok
1.2v X 150A is 180W, TDP passed- card maybe confused or throttles down badly (lower states use lower volts)
So if it wanted to equalize properly, It could do 2 things (not sure what it does):
-Drop the clock/vcore to a lower state, lets say 1.0v and 1050 mhz. 1.0v, keep 150A limit, get 150watts.
-Drop the watts but keep the 1.2v vcore state (lets say 1300mhz), this is where you get throttling.... But

It's actually better and more efficient to do 150W at the 1.0v@1050, getting more processing done
than to do 150W at the 1.2v@1300, because the 1300 state is hitting the limit, making the GPU "pause" like an idle state.

I know this because I was messing with powertune using OCCT, the best stress torture test... that test will show you if your settings are real or just benchmark queens smile.gif It will tell you if there are calculation errors!!! No more stupid reliance on looking for artifacts. Sometimes you can have many errors but have no artifacts!

OCCT Link: http://www.ocbase.comhttp://www.ocbase.com
I use 640x480, directX11, error check ON, shader complexity 7, FPS limit 0 (which will make you throttle).
If you want less throttling to test higher states, set a fps limit. For example I use 500 to get around my peak states to test typical gameplay (1.15@1235 and 1.175@1275)

Look at hwinfo64 and see how much juice you can pump, heat goes through the roof, but if you get the PT numbers right and the PT% right, you will have the card set up to never crash on OCP (overcurrent protection)


Yes, i think that 75% Amperage to Wattage figure is from doing 1.2 load situations. For people with high leakage gpus I think it should be more even, and people with low leakage probably need this the most.
Quote:
Originally Posted by daevy3k View Post

So, the best settings I found so far for my Nitro OC+ 4gb :

Core 1300mhz@1065mv (drops to 1050mv under load)
Ram 2075mhz@1000v
1625 timings strap, 1500 one doesn't work with above values

Tdc 110a
Tdp 110w
Power limit 140w
Temps never go over 60c with fans@50%
Average consumption under load is 100w,I have zero throttling and it is perfectly stable.

The gpu wanted 1.230v to reach 1400mhz,and I don't think it would be worth it.

I'm getting 1400pts in heaven, pretty satisfied tbh.

Only thing I hate is that fan settings don't work, something is wrong with sensivity I think

Mind sharing what brand of ICs does your card have? Samsung/Elpida/Hynix. My Hynix doesn't like anything beyond 1900mhz on slow 2000 strap. It's a total dud.
post #1302 of 3314
Anyone tried with the latest drivers? I want to flash a BIOS with the timings lowered, but only if it is supported in the lastest drivers.
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post #1303 of 3314
Works with Pixel clock patcher that signs the driver to allow custom bios.
post #1304 of 3314
@PPBottle

I have Samsung ram!
post #1305 of 3314
Quote:
Originally Posted by daevy3k View Post

@PPBottle

I have Samsung ram!

It shows! Sadly I wasn't as lucky. I'm considering jumping boat and getting a 480 8GB and get guaranteed samsung ram, since I cant get assured Samsung ICs on the 4GB models.

EDIT: Seems current Nitro+ 4GB 470s are going with Samsung ICs, can anyone confirm if Sapphire 470 4gb Reference is too going recently with Samsung ICs?
Edited by PPBottle - 2/15/17 at 3:57pm
post #1306 of 3314
PLZ i`ve an important Q and need help
i`ve 6 cards (sapphire rx 480 8gb ddr5 nitro oc)
i was flashing thim because it gives me 24 mh/s and need tomake the hash rate 28mh/s
i`ve flashed 3 cards successfully useing Atiwinflash & Polaris Bios Editor
the room for these 3 cards is 512kb
when i tried to flash the other 3 cards i found the bios file is 256kb and when i open it on Polarise bios editor i got a massage saying:
This BIOS is less than the standard 512 kb size.
Flashung this BIOS my corrupt your graphics card

so the Q is proceed in the flashing process? or not? i`m afraid to damage my card
hope some one help me as soon as possible
thanks in advance
post #1307 of 3314
You need to extract BIOS'es with the Atiwinflash itself (save option), that way you always get the full 512kb bios.

GPU z only extracts the bits with stored data. Some polaris bioses have 256kb blank space and 256kb actually written, this is why you get that error on Polaris Bios editor.
post #1308 of 3314
Guys.

I tried searching for, but i couldn't find any info, on HOW EXACTLY to mod the AMD driver .sys file.

I mean, i do not want to be stuck with only 1 version of the drivers. Currently using 17.2.1. and i am trying to unlock the RX460 shaders/TMU's
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post #1309 of 3314
Quote:
Originally Posted by PPBottle View Post

You need to extract BIOS'es with the Atiwinflash itself (save option), that way you always get the full 512kb bios.

GPU z only extracts the bits with stored data. Some polaris bioses have 256kb blank space and 256kb actually written, this is why you get that error on Polaris Bios editor.


as i said in my post i`m already useing atiwinflash useing save button

and it extracted it to me 256 kb

now if i edited it in polaris and flashed it useing atiwinflash , is there any something wronge will happen to my gpu ?
post #1310 of 3314
Hey people...back with a couple of new questions and observations I just cannot explain.

Powercolor RX 480 Red Devil 6600k Skylake build

Anyhow, when I got this gpu a couple of months ago as a RMA replacement I flashed the "official red devil" unlock bios from Powercoler just assuming that was really needed to overclock. My have a learned a lot about polaris chips since then.

My issue mainly was I would randomly get gpu memory errors at anything above 2125 until I rebooted then it was fine with no errors. It did not matter the method of overclocking used, wattman, watttool or 3rd party ( all seperately not together)

Well this morning I took look at the low performance bios / quiet or whatever you call it that came with the GPU as well. Once I loaded it, in watttool it showed some different settings then the original high performance and the unlocked bios from powercolor in the I2C settings. It got me thinking about using the quiet/cool bios for overclocking.

So I went and extracted it via atiwinflash, flashed it to the other side of the dual bios switch and started overlocking. Knowing I was at this point voltage limited.

First issue ran into voltage throttling. DUH...back to Watttool and set the voltages to the same as what powercolor used in their released unlocked bios. Flashed and all that stuff and rebooted.

Anyhow the current scale and Voltage offset on the cool/quiet bios are quite different then the high performance bios from Powercolor.

Long story short is the cool quiet bios seems to actually overclock better once I unlocked the voltage in the polaris bios editor. Odd note is the cool/quiet power limit from stock is 30% and the original high performance power limit was 5% and the unlocked one is 50%

I am currently testing core of 1450 memory at 2250. My gpu core is not the best and requires a fair amount of voltage to hit 1450 stable but I have done a red mod to it so temps are great.

2nd using the cool/quiet bios with the voltage unlock edit at my overclock is cooler then unlocked bios overclock.

I hope this all make some kind of sense.

The random GPU errors had me baffled.
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