[UPDATE] RX480 (Ref) 31+Mh, Custom Rom - VDDC OFFSET + Custom timing

[Eliovp]

VDDC Offset + Basic Custom timing
------------------
Here's a nice update for those who have Reference cards.
In the package included, i've put 4 roms with VDDC offset.
1. -50mV
2. -69mV
3. -81mV
4. -100mV

You can of course adjust these however you want, if you want to have an even tighter undervolt you can search the rom for this --> "8D 00 F8 00" and replace the F8 part with EE(-112) for example.

These roms also have a custom timing included. It's a basic one but it will give you a very high increase for XMR.

Greetings and have fun!

Link: Here


"Also posted this in the op".

[coinzoid]

VDDC Offset + Basic Custom timing
------------------
Here's a nice update for those who have Reference cards.
In the package included, i've put 4 roms with VDDC offset.
1. -50mV
2. -69mV
3. -81mV
4. -100mV

You can of course adjust these however you want, if you want to have an even tighter undervolt you can search the rom for this --> "8D 00 F8 00" and replace the F8 part with EE(-112) for example.

These roms also have a custom timing included. It's a basic one but it will give you a very high increase for XMR.

Greetings and have fun!

Link: Here


"Also posted this in the op".

How about non-ref cards? I have Sapphire RX480 Nitro's and would like to automate the task of -120 through bios. Currently undervolting my cards via Trixx and cards with lower Asics quality even work fine with -160. Claymore commands didn't detect more than -100 so if possible I'd like to add specific downvolt values for each card's bios manually and flash them afterwards.

[dagarair]

he can't give it all away for free bro.  Well he could but then he would be poor. 

[Marvell1]

VDDC Offset + Basic Custom timing
------------------
Here's a nice update for those who have Reference cards.
In the package included, i've put 4 roms with VDDC offset.
1. -50mV
2. -69mV
3. -81mV
4. -100mV

You can of course adjust these however you want, if you want to have an even tighter undervolt you can search the rom for this --> "8D 00 F8 00" and replace the F8 part with EE(-112) for example.

These roms also have a custom timing included. It's a basic one but it will give you a very high increase for XMR.

Greetings and have fun!

Link: Here


"Also posted this in the op".

How about non-ref cards? I have Sapphire RX480 Nitro's and would like to automate the task of -120 through bios. Currently undervolting my cards via Trixx and cards with lower Asics quality even work fine with -160. Claymore commands didn't detect more than -100 so if possible I'd like to add specific downvolt values for each card's bios manually and flash them afterwards.

Asic quality does not have anything to do with how much you can undervolt i think when mining eth since you alwasy use a lower core clock anyways

[xx3]

I have a new XFX RX480 Reference 8GB. Part number : RX-480M8BFA6 with Samsung memory

I can not upload any rom that has 512k.

The RX480Mod gives me about 25.5-26Mh

The 480LowEnergyOK gives me about 15-16Mh

Any advice ?

[matmator]

@eliovp: hello

With your 4 new bios the hasrate ethereum is optimized?

thx

[Eliovp]

@eliovp: hello

With your 4 new bios the hasrate ethereum is optimized?

thx

Best thing you could do is try it.

I can only guarantee a significant raise in hashrate for XMR.

ETH speed will most likely be up a bit as well.

Greetings

[matmator]

@eliovp: ok I'll try you're right.

You would not have a mod bios for the rx480 nitro + no oc?

Impossible to exceed 28.8 mh.

I just copy timmings 1625 in 2000

But I can not increase memory much. (2030) max

[matmator]

bsod directly with your bios -100mv.

(dual mining ) eth+pasc

[Truthchanter]

Eliovp and others, are you currently or have been mining xmr instead of eth?

[citronick]

@eliovp: hello

With your 4 new bios the hasrate ethereum is optimized?

thx

Best thing you could do is try it.

I can only guarantee a significant raise in hashrate for XMR.

ETH speed will most likely be up a bit as well.

Greetings

I am currently using 28lowpowerOK rom.

Working nicely for many months on Sapphire 480 Reference rigs. Decent hash and low heat and power.

What percentage improvement for ETH and XMR?

Worth it to upgrade?

[Eliovp]

bsod directly with your bios -100mv.

(dual mining ) eth+pasc

Blue screen :p, that's a driver issue..

After you flash this rom make sure you completely turn off your power (the voltage controller has to be reprogrammed).

It's even best to first run DDU and reinstall drivers, this isn't necessary but in some cases it can help.

+ Dual mining with a -100mV undervolt .. 

[matmator]

Yes maybe i will have to test with eth only

Would you have a bios to propose for rx 480nitro + oc?

[zeftcool]

8D 00 ** 00
only work for my IR3567B card
it's not work for my other refference card

[Truthchanter]

Can a voltage offset (either through bios or something like WattTool) yield lower power consumption than just setting the undervolt to the same low value the offset would be at?

Otherwise, besides it being in the bios. I don't see much of a point to using an offset

[midas28]

Is there a linux tutorial to flash the rom

[CharlieCox]

Is there a linux tutorial to flash the rom

Not sure if I can post links, but this is it basically:
https://www.techpowerup.com/articles/overclocking/vidcard/34/8

To backup: sudo atiflash -s 0 oldbios.rom (where 0 represents the card, 0 is the first card on your motherboard)
To write the new bios: sudo atiflash -p 0 newbios.rom

[zeftcool]

anybody know register vddc offset for saphire nitro rx 480?
i try 8D 00 ** 00 it just work for my nitro+ and not work for nitro.
they both are different card..
http://sapphirenitro.sapphiretech.com/en/480-4.html
http://sapphirenitro.sapphiretech.com/en/rx-480-4.html

[doktor83]

VDDC Offset + Basic Custom timing
------------------
Here's a nice update for those who have Reference cards.
In the package included, i've put 4 roms with VDDC offset.
1. -50mV
2. -69mV
3. -81mV
4. -100mV

You can of course adjust these however you want, if you want to have an even tighter undervolt you can search the rom for this --> "8D 00 F8 00" and replace the F8 part with EE(-112) for example.

These roms also have a custom timing included. It's a basic one but it will give you a very high increase for XMR.

Greetings and have fun!

Link: Here


"Also posted this in the op".

This is global vddc offset ?

[citronick]

@eliovp: hello

With your 4 new bios the hasrate ethereum is optimized?

thx

Best thing you could do is try it.

I can only guarantee a significant raise in hashrate for XMR.

ETH speed will most likely be up a bit as well.

Greetings

I am currently using 28lowpowerOK rom.

Working nicely for many months on Sapphire 480 Reference rigs. Decent hash and low heat and power.

What percentage improvement for ETH and XMR?

Worth it to upgrade?

wow ... XMR really got a good boost.

my 6xGPU XMR around 3.4-3.7Kh/s with "28MHlowenergyOK" -- great for ETH btw.
now with -100mV..... 4.1-4.7Kh/s ! Pretty good update this Eliovp - well done.
I wonder how it performs on ETH mining.

The B1 Panda btw, on XMR is at 6.4-6.6Khs with your custom rom.