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Thread: Would appreciate help in finding / editing the voltage offset in the RX480 Bios Reply to Thread
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  Topic Review (Newest First)
04-27-2019 12:02 PM
morecs nvm
12-13-2018 04:50 AM
trihy Guys, Im familiar with nvidia bios editing.

But on amd Im terrible.

Could anyone help me to lower the voltage on my card? It gets really hot under load and any mv lower will be great.

It's ok to dump the bios with gpuz?

What does this 950mv means?

According to msi ab my card uses a lot more mv than 950 under load.

BTW, also wattman shows 950mv for the last 4 states.

Edit. Applied -45mv with msi ab and worked fine

How can I apply a -40 or -50mv undervolt in bios?

Atttached stock bios for my card. f anyone could take a look, it will be great.

Thanks.
12-03-2018 02:21 AM
mynm
Quote: Originally Posted by dsanke View Post
Got XFX RX 480 and stuck with VOI too.
It doesn't work at all.
GPU1-B06-D20: ON NCP81022
Modified VOI Table:
Code:
32 00 03 01 01 03 16 00 10 96 40 00 00 00 00 00 D2 00 00 00 E6 00 EC 00 FF 00 01 07 0C 00 0E 00 00 00 00 00 00 00 04 07 0C 00 0E 00 00 00 00 00 00 00
Original VOI Table:
Code:
1C 00 03 01 01 07 0C 00 0E 00 00 00 00 00 00 00 04 07 0C 00 0E 00 00 00 00 00 00 00
The VOI and the 40 address is ok.

Maybe you will have to add some values to the asic int, and the set voltage table like here: https://www.overclock.net/forum/27735056-post883.html . Did the attached tables worked for your msi bios?

Maybe the attached files in the linked post could work for this xfx bios. But maybe I will have to see your xfx 480 bios first to be sure.
12-02-2018 06:24 PM
dsanke Got XFX RX 480 and stuck with VOI too.
It doesn't work at all.
GPU1-B06-D20: ON NCP81022
Modified VOI Table:
Code:
32 00 03 01 01 03 16 00 10 96 40 00 00 00 00 00 D2 00 00 00 E6 00 EC 00 FF 00 01 07 0C 00 0E 00 00 00 00 00 00 00 04 07 0C 00 0E 00 00 00 00 00 00 00
Original VOI Table:
Code:
1C 00 03 01 01 07 0C 00 0E 00 00 00 00 00 00 00 04 07 0C 00 0E 00 00 00 00 00 00 00
07-05-2018 01:27 AM
EMYHC Finally i'm able to set my offset!One question,what is the right values for +12mv offset?my registry is E6 00 F8 00,and i give -50 mv,is possible set -12mv or any values not multiples of 25?
06-13-2018 08:27 AM
EMYHC I try to follow the guide of Gupsterg for add offset to my nitro 580,everything is well,but when i compare with stock with winmerge my offset are always +4 bytes of stock...what i wrong?When drag and drop file is fixed i post my bios...
06-12-2018 12:26 PM
EMYHC Hi guys,anyone can add offset register to my bios?My card is a sapphire nitro+ rx 580 8 GB,the last mod that i want made is add +25 offset(my card is on liquid,i have no problem with temp),someone can mod the bios for me please?
10-28-2017 11:10 AM
Awesomeguy10578 I've read this thread on how to mod the NCP81022 on my Sapphire RX 580 Nitro and I'm just a bit confused with all the information on different posts and things like that. Can you guys give me some pointers? Also I have 2 cards on CFX so when reading it I wasn't sure what do I have to do differently. Thanks
Quote:
Originally Posted by wincomo View Post

I have 580 with NCP81022 and successfully added -50mv voltage offset in bios via register E6.
The stock i2c table is this: 01 03 0E 00 10 96 20 00 00 00 00 00 FF 00
first tried this: 01 03 12 00 10 96 20 00 00 00 00 00 E6 00 F8 00 FF 00 and it's not working,
then I tested: 01 03 12 00 10 96 40 00 00 00 00 00 E6 00 F8 00 FF 00 and now it works fine.

Could you help me explain how does it work? I'm kinda confused, I'm trying to add a positive voltage offset which is not what you were doing. I'm kinda new to this I2C control thing. Thanks.
10-04-2017 09:31 PM
dantok I`ve read this post over and over again. But for the life of me i cannot get the cards running.

I have a Sapphire RX570 Nitro + and it has a NCP 81022 @ D20.

I`ve checked and confirmed this. However, it's not so much of the voltage offset not working. But more like the card wouldn't boot into windows after being flashed with the offset at E6 register.

Would it be caused by the CSM module being turned off? I have checked my offset tables over and over again and compared the ATOM BIOS Reader txt file over and confirm that the lengths are correct and match 100% to check the offsets.

Any ideas?

I`ve attached my bios for reference.

https://www.dropbox.com/s/80ckd2l2uk5423k/RX570_4GB_OC_MICRON_STOCK.rom?dl=0

Modded Bios with offset and 40

https://www.dropbox.com/s/f7fvqedra3fyq7y/RX570_4GB_OC_MICRON_voltmod.rom?dl=0
09-27-2017 06:54 PM
kilogrm70
Quote:
Originally Posted by Vento041 View Post

I'm writing this here since the PBE thread is becoming a mod request thread.

Guys, is there somewhere the list (or even links to multiple documents/posts/infos) with all the differences between the 4xx series and the 5xx series? Apart from improved architecture, I'm talking about all those thing that could be "ported" like the 1000 MHz memory step (I ported it to my RX 480 Nitro+ OC bios, seem my forum sign). My first project was a "480 to 580 conversion", since there are so much differences between 4xx/5xx PCBs (or at least of the card that I care), I prefer to maintain a 100% compatibility by using the original bios (and getting more performance), and "modding the hell out of it" biggrin.gif

I'm interested in "new algorithms"/"power saving features"/..../... basically all those "extreme" features that really translate to tweaked values.

How were you able to port the 1000 Mhz memory step to your RX 480 bios? I currently have an ASUS Reference RX 480 card running Elmer's unlocked Air bios, which is referenced below
https://overclocking.guide/download/amd-radeon-rx-480-unlocked-air-bios/

I would like to add the 1000 Mhz step to it. Can you point me in the right direction for information on how to do it?
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