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Polaris Bios Editing ( RX5xx / RX4xx ) - Page 133

post #1321 of 3318
Quote:
Originally Posted by PPBottle View Post

Or is it sheer trial and error and flashing like 100 times different bioses and see if the spaghetti sticks to the wall or not?

Thanks in advance.

pretty much this yea tbh lol xP
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post #1322 of 3318
Thread Starter 
Quote:
Originally Posted by PPBottle View Post

I think that the question really is: "how do you determine which timing is more giving/detrimental to performance AND stability of the whole sequence?"

Using pure straps on my sk hynix ones is simple, but having it stable even at stock 1750mhz on 1500 strap is hard. What timings should you mix from other straps and in which order to have timings loose where performance doesnt count (but adds to stability), and which have tighter to gain performance (without losing stability)?

On System RAM things are really presented to yourself and we all know what the first 4 timings do, and what do they do to performance and with trial and error, to stability given your memory module's particularities, VRAM timing mod is a lot fresher topic in this regard, so I dont think that what I know of system ram timings really apply here since DDR1-4 and GDDR5 are kind of different. So to the people mixing timings: what do you look after when doing it? Or is it sheer trial and error and flashing like 100 times different bioses and see if the spaghetti sticks to the wall or not?

Thanks in advance.

I change 1 value at time and i look if i gain fps/bandwidth/points. Yes is a trial and error...but i love this "hobby". From 216gb/s to 235gb/s(no errors so far) is not bad. Testing the witcher 3 i have seen a nearly linear scaling increasing bandwidth.

http://www.overclock.net/t/1605802/official-radeon-rx480-470-460-owners-club/990. Interesting posts
Edited by generaleramon - 2/19/17 at 1:12pm
post #1323 of 3318
Yesterday i bought RX 480 Nitro+ 4gb. It is supposed can not be unlocked because it has hynix vram. But today i try to mod my bios with polaris bios editor and change from 4096 to 8192 and density from 0x53 to 0x63. And yep, it works....biggrin.gif





Edited by ekoaja - 2/20/17 at 2:49am
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post #1324 of 3318
Quote:
Originally Posted by ekoaja View Post

Yesterday i bought RX 480 Nitro+ 4gb. It is supposed can not be unlocked because it has hynix vram. But today i try to mod my bios with polaris bios editor and change from 4096 to 8192 and density to 0x63. And yep, it works....biggrin.gif
I tried with mine (4GB with Samsung memory) a few months ago by using the 8GB BIOS and it didn't work. But I haven't tried yet just changing the density.
post #1325 of 3318
Quote:
Originally Posted by SSBrain View Post

I tried with mine (4GB with Samsung memory) a few months ago by using the 8GB BIOS and it didn't work. But I haven't tried yet just changing the density.

Have you try to extract the bios (4gb) from gpu-z and then mod it with polaris bios editor ?
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post #1326 of 3318
Quote:
Originally Posted by ekoaja View Post

Have you try to extract the bios (4gb) from gpu-z and then mod it with polaris bios editor ?
I just did this (actually I extracted with ATIWinFlash). I changed the density to 0x63 and memory size to 8192 MB, then flashed.

At first it seemed to boot correctly and GPU-z even detected 8192 MB of memory, but then when I tried accessing the "extra" memory with the OpenCL Bench that others in this thread have used to check the effecting memory speed, the system froze, severe multicolored artifacts appeared on screen and I had to reset with the proper BIOS.

So I guess it only tricks the card into thinking that it has more memory. But perhaps I'm doing something wrong.

You should try allocating all the video memory, just in case anyway.

EDIT:
I tried again by running multiple instances of Unigine Heaven and Valley, and as soon the system starts using more than 4GB of VRAM I get heavy on-screen artifacting. This time the system didn't freeze, though.

Perhaps there there still could be more to "trick", who knows!
Edited by SSBrain - 2/20/17 at 3:18am
post #1327 of 3318
Quote:
Originally Posted by SSBrain View Post

I just did this (actually I extracted with ATIWinFlash). I changed the density to 0x63 and memory size to 8192 MB, then flashed.

At first it seemed to boot correctly and GPU-z even detected 8192 MB of memory, but then when I tried accessing the "extra" memory with the OpenCL Bench that others in this thread have used to check the effecting memory speed, the system froze, severe multicolored artifacts appeared on screen and I had to reset with the proper BIOS.

So I guess it only tricks the card into thinking that it has more memory. But perhaps I'm doing something wrong.

You should try allocating all the video memory, just in case anyway.

EDIT:
I tried again by running multiple instances of Unigine Heaven and Valley, and as soon the system starts using more than 4GB of VRAM I get heavy on-screen artifacting. This time the system didn't freeze, though.

Perhaps there there still could be more to "trick", who knows!

I tried with Assasins Creed Syndicate, with maximum setting include 4x msaa + fxaa, vram used almost 5gb, and no problem
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post #1328 of 3318
Quote:
Originally Posted by ekoaja View Post

I tried with Assasins Creed Syndicate, with maximum setting include 4x msaa + fxaa, vram used almost 5gb, and no problem

When you use ATIWinFlash, what does it say here?
On my card it's always 128Mx32 4GB regardless of the BIOS.

baVooBR.png
post #1329 of 3318
Quote:
Originally Posted by SSBrain View Post

When you use ATIWinFlash, what does it say here?
On my card it's always 128Mx32 4GB regardless of the BIOS.

baVooBR.png

Atiwinflash didn't work on my system. It says "No discrete Ati Card"
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post #1330 of 3318
And what sort of memory code you get here in Polaris Bios Editor?

viwR9qE.png

Here on mine it's K4G41325FE, which I also verified being the same on the actual chips after disassembling my video card. It's for 512MB Samsung modules, and since the card has 8 modules, that's 4096MB in total. 1GB modules begin with K4G8.

For Hynix memory it will be a different story, but it's possible that your card has 1GB modules that are soft limited to 512MB.
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