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Polaris Bios Editing ( RX5xx / RX4xx ) - Page 268

post #2671 of 3382
Thread Starter 
"How to Read/Mod Memory HEX Values" section in the first post is a little better now i hope
How to Read/Mod Memory HEX Values (Click to show)

Example:
Use AtomBiosReader (GitHub - kizwan/ATOMBIOSReader or Download Section) to generate the master list of command and data tables.

Open the generated .txt

Look for (Example) : 001c: a446 Len 0753 Rev 02:02 (VRAM_Info)

a446 : is the start adress
0753 : is the lenght

Open the Bios with an Hex editor , i use HxD (Download Section)

At the beginning of the VRAM_Info section (Text, not in HEX) you will find the memory model/s supported by the bios

.... ...@.a!.......Ce......K4G80325FB.2.Tv:.¢`ÿ..P..c...... ...

only K4G80325FB (made by Samsung > Use Google) in this case, so the memID in the straps is 00

40 0D 03 00 77 70 00 00 00 00 00 00 22 CC 1C 00 31 F6 7E 57 F0 57 11 18 3F CF B6 0D 00 6C 07 01 24 08 14 20 FA 89 00 A0 03 00 00 00 1E 12 3A 46 DB 35 40 19

in case of two memory brand memID 01 and 02 are possible

Example of a 2000Mhz strap

40 0D 03 02 99 90 00 00 00 00 00 00 22 AA 1C 00 F7 F6 7E 4F D0 55 13 19 C6 50 B7 0D 00 6C 06 01 1D 0C 14 20 EA 89 80 AC 03 00 00 00 1E 18 32 38 DB 36 47 19

The frequency is 40 0D 03 > inverted is 03 0D 40 > converted in decimal is 200000 > remove "00" > 2000Mhz strap

02 is the mem ID. In this bios 02 is for Micron set of timings. 01 is the other set. 00 if only one memory is supported

99 90 00 00 00 00 00 00 22 AA 1C 00 F7 F6 7E 4F D0 55 13 19 C6 50 B7 0D 00 6C 06 01 1D 0C 14 20 EA 89 80 AC 03 00 00 00 1E 18 32 38 DB 36 47 19 are the timings of this strap. Like 9-9-9-24 ecc ecc in your system ram.

Try to use tighter straps than stock but keep the last 8 timings from the higher straps(1750-2000 usually,try what's best) the last 8 values helps a lot at high mem clock.

Edited by generaleramon - 4/27/17 at 2:22pm
post #2672 of 3382
So, i shouldn't mess with memory oc if im running on stock bios?
What can memory controller voltage change? Can overvolting it increase memory stability at 2120mhz?
post #2673 of 3382
Gigabyte just Released new bios for RX 570:
http://www.gigabyte.com/Graphics-Card/GV-RX570GAMING-4GD#support-dl
Quote:
Release for SKHYNIX Memory
AMD Source BIOS Version: 015.050.002.001
GPU Clock : 1244MHz
Memory Clock: 7000 MHz
Improve power efficiency
For F10 BIOS flash
Quote:
Release for ELPIDA Memory
AMD Source BIOS Version: 015.050.002.001
GPU Clock : 1244MHz
Memory Clock: 7000 MHz
Improve power efficiency
For F1~ F5 BIOS flash

Who want's to try?
Edited by Hwgeek - 4/27/17 at 9:07pm
post #2674 of 3382
Is everyone else having an issue with setting voltages below 0.9V in Polaris Bios Editor? No matter what value under 0.9V I set for core clock, it defaults back to 0.9 while running. Is there a workaround for this? I'd prefer to tune it with AB but this is on a linux system
post #2675 of 3382
Quote:
Originally Posted by Apneal View Post

Is everyone else having an issue with setting voltages below 0.9V in Polaris Bios Editor? No matter what value under 0.9V I set for core clock, it defaults back to 0.9 while running. Is there a workaround for this? I'd prefer to tune it with AB but this is on a linux system
Core voltage cannot go lower than the memory voltage. You'd need to drop that first (assuming it can go lower)
post #2676 of 3382
Quote:
Originally Posted by ziddey View Post

Core voltage cannot go lower than the memory voltage. You'd need to drop that first (assuming it can go lower)

I figured, I try to set them equal, but even if core and mem controller voltages are equal, lets say 0.85 for both, the core still runs 0.9
post #2677 of 3382
Quote:
17.4.3+ Drivers Allow modded Bios

This does not seem to be correct. Changed timings on the asus rx570 bios and driver wouldn't load until patched.
post #2678 of 3382
Quote:
Originally Posted by Hwgeek View Post

Gigabyte just Released new bios for RX 570:
http://www.gigabyte.com/Graphics-Card/GV-RX570GAMING-4GD#support-dl

Who want's to try?

Ok- since I was the first to try rx570 bios, I gave this one chance too.
First of all- the bios works on SHapphire Nitro+ RX 470 4GB.
Another interesting thing is that the IDLE power draw dropped downd to under 10W! with Nitro RX 570 it was 29W!
I run time spy:

http://www.3dmark.com/3dm/19582766


Update: Run it @ shapphire Nitro clock: 1340/1750= lower score:
http://www.3dmark.com/3dm/19583061
but much less Vcore and power.
Edited by Hwgeek - 4/27/17 at 10:38pm
post #2679 of 3382
Basic question here but... Do we have to apply the new timings only to 2000Mhz strap? Or to 1750 and 1650 also?
post #2680 of 3382
Quote:
Originally Posted by Mhazz View Post

Basic question here but... Do we have to apply the new timings only to 2000Mhz strap? Or to 1750 and 1650 also?
only need it for what you run your ram at
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