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

[barabeku]

1x XFX BE ref - 95W (GPU-Z) - 30MH/s
3x PowerColor - 90W (GPU-Z) - 30MH/s

Total Power draw 735W on the wall

using Tighter strap
First I set to reach the target speed (30MH/s)
then lowering power limits down to the stable points.
Each GPU have different bios parameters.

Win 7 - Crimson 16.7.3 (Configured using RDP - no monitor attached)

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[Camnates]

1x XFX BE ref - 95W (GPU-Z) - 30MH/s
3x PowerColor - 90W (GPU-Z) - 30MH/s

Total Power draw 735W on the wall

using Tighter strap
First I set to reach the target speed (30MH/s)
then lowering power limits down to the stable points.
Each GPU have different bios parameters.

Win 7 - Crimson 16.7.3 (Configured using RDP - no monitor attached)

Did you change the timing strap in the bios or using other tools? The efficiency sees not no high as it is 735W for 120 MH/s.

[Amph]

1x XFX BE ref - 95W (GPU-Z) - 30MH/s
3x PowerColor - 90W (GPU-Z) - 30MH/s

Total Power draw 735W on the wall

using Tighter strap
First I set to reach the target speed (30MH/s)
then lowering power limits down to the stable points.
Each GPU have different bios parameters.

Win 7 - Crimson 16.7.3 (Configured using RDP - no monitor attached)

if the total power is 735w and you have only 4 gpu then each one is not consuming 90w only...more like 150w minimum

[barabeku]

1x XFX BE ref - 95W (GPU-Z) - 30MH/s
3x PowerColor - 90W (GPU-Z) - 30MH/s

Total Power draw 735W on the wall

using Tighter strap
First I set to reach the target speed (30MH/s)
then lowering power limits down to the stable points.
Each GPU have different bios parameters.

Win 7 - Crimson 16.7.3 (Configured using RDP - no monitor attached)

Did you change the timing strap in the bios or using other tools? The efficiency sees not no high as it is 735W for 120 MH/s.

yes i change the timing strap. about 150W each card

[barabeku]

1x XFX BE ref - 95W (GPU-Z) - 30MH/s
3x PowerColor - 90W (GPU-Z) - 30MH/s

Total Power draw 735W on the wall

using Tighter strap
First I set to reach the target speed (30MH/s)
then lowering power limits down to the stable points.
Each GPU have different bios parameters.

Win 7 - Crimson 16.7.3 (Configured using RDP - no monitor attached)

if the total power is 735w and you have only 4 gpu then each one is not consuming 90w only...more like 150w minimum

yes gpu-z always show less than real power draw.

[Deepcleen]

1x XFX BE ref - 95W (GPU-Z) - 30MH/s
3x PowerColor - 90W (GPU-Z) - 30MH/s

Total Power draw 735W on the wall

using Tighter strap
First I set to reach the target speed (30MH/s)
then lowering power limits down to the stable points.
Each GPU have different bios parameters.

Win 7 - Crimson 16.7.3 (Configured using RDP - no monitor attached)

Did you change the timing strap in the bios or using other tools? The efficiency sees not no high as it is 735W for 120 MH/s.

yes i change the timing strap. about 150W each card

Is that dual mining? If that is solo mining, then 150W is quite high.

Did you change the memory strap yourself?

[a1xerz]

thank

[Unclegogi]

For Windows 10 users, you can do this:

i) Press Windows Key + X to open Power User Menu. Select Command Prompt (Admin) from the menu.
ii) Once the Command Prompt open, enter bcdedit.exe -set loadoptions DISABLE_INTEGRITY_CHECKS and press Enter. Then enter bcdedit.exe -set TESTSIGNING ON and press Enter.
iii) Close Command Prompt and restart your PC.

If this fails for some reason, you can reboot with Signature checks disabled by rebooting into advanced options (Hold left shift key while hitting reboot button) and hit F7.

You need to copy the modified atikmdag.sys file into your drivers folder as well (C:/Windows/System32/Drivers)

File can be found here: Here

I have just bought one reference RX480, flashed mod bios, with stock driver I get Error 43 in device manager.
If I replace atikmdag.sys with the modified one, I get Error 31 in device manager.
"bcdedit.exe -set loadoptions DISABLE_INTEGRITY_CHECKS" and "bcdedit.exe -set TESTSIGNING" are done, both windows installations are in testing mode.
Tried both Win7 and Win10, original drivers 16.7.3 and 16.8.2, result is the same.

[mikhan]

shift-reboot and choose smth like "don't check drivers signatures" at startup menu

[Eliovp]

For Windows 10 users, you can do this:

i) Press Windows Key + X to open Power User Menu. Select Command Prompt (Admin) from the menu.
ii) Once the Command Prompt open, enter bcdedit.exe -set loadoptions DISABLE_INTEGRITY_CHECKS and press Enter. Then enter bcdedit.exe -set TESTSIGNING ON and press Enter.
iii) Close Command Prompt and restart your PC.

If this fails for some reason, you can reboot with Signature checks disabled by rebooting into advanced options (Hold left shift key while hitting reboot button) and hit F7.

You need to copy the modified atikmdag.sys file into your drivers folder as well (C:/Windows/System32/Drivers)

File can be found here: Here

I have just bought one reference RX480, flashed mod bios, with stock driver I get Error 43 in device manager.
If I replace atikmdag.sys with the modified one, I get Error 31 in device manager.
"bcdedit.exe -set loadoptions DISABLE_INTEGRITY_CHECKS" and "bcdedit.exe -set TESTSIGNING" are done, both windows installations are in testing mode.
Tried both Win7 and Win10, original drivers 16.7.3 and 16.8.2, result is the same.

Boot windows
Install driver
go to device manager, right click on your gpu, disable it.
reboot to safe mode
replace atikmdag.sys
open the signing tool "http://www.ngohq.com/?page=dseo" and sign that file.
open admin cmd window and type "bcded /set TESTSIGNING on"
reboot
Device manager, enable GPU again.
Done.

[Deepcleen]

For Windows 10 users, you can do this:

i) Press Windows Key + X to open Power User Menu. Select Command Prompt (Admin) from the menu.
ii) Once the Command Prompt open, enter bcdedit.exe -set loadoptions DISABLE_INTEGRITY_CHECKS and press Enter. Then enter bcdedit.exe -set TESTSIGNING ON and press Enter.
iii) Close Command Prompt and restart your PC.

If this fails for some reason, you can reboot with Signature checks disabled by rebooting into advanced options (Hold left shift key while hitting reboot button) and hit F7.

You need to copy the modified atikmdag.sys file into your drivers folder as well (C:/Windows/System32/Drivers)

File can be found here: Here

I have just bought one reference RX480, flashed mod bios, with stock driver I get Error 43 in device manager.
If I replace atikmdag.sys with the modified one, I get Error 31 in device manager.
"bcdedit.exe -set loadoptions DISABLE_INTEGRITY_CHECKS" and "bcdedit.exe -set TESTSIGNING" are done, both windows installations are in testing mode.
Tried both Win7 and Win10, original drivers 16.7.3 and 16.8.2, result is the same.

Boot windows
Install driver
go to device manager, right click on your gpu, disable it.
reboot to safe mode
replace atikmdag.sys
open the signing tool "http://www.ngohq.com/?page=dseo" and sign that file.
open admin cmd window and type "bcded /set TESTSIGNING on"
reboot
Device manager, enable GPU again.
Done.

Does it apply to Windows 10 as well?

Should we enter the test mode?

I only have Windows 8.1. So I might have to wait for the 8.1 drivers.

[Eliovp]

For Windows 10 users, you can do this:

i) Press Windows Key + X to open Power User Menu. Select Command Prompt (Admin) from the menu.
ii) Once the Command Prompt open, enter bcdedit.exe -set loadoptions DISABLE_INTEGRITY_CHECKS and press Enter. Then enter bcdedit.exe -set TESTSIGNING ON and press Enter.
iii) Close Command Prompt and restart your PC.

If this fails for some reason, you can reboot with Signature checks disabled by rebooting into advanced options (Hold left shift key while hitting reboot button) and hit F7.

You need to copy the modified atikmdag.sys file into your drivers folder as well (C:/Windows/System32/Drivers)

File can be found here: Here

I have just bought one reference RX480, flashed mod bios, with stock driver I get Error 43 in device manager.
If I replace atikmdag.sys with the modified one, I get Error 31 in device manager.
"bcdedit.exe -set loadoptions DISABLE_INTEGRITY_CHECKS" and "bcdedit.exe -set TESTSIGNING" are done, both windows installations are in testing mode.
Tried both Win7 and Win10, original drivers 16.7.3 and 16.8.2, result is the same.

Boot windows
Install driver
go to device manager, right click on your gpu, disable it.
reboot to safe mode
replace atikmdag.sys
open the signing tool "http://www.ngohq.com/?page=dseo" and sign that file.
open admin cmd window and type "bcded /set TESTSIGNING on"
reboot
Device manager, enable GPU again.
Done.

Does it apply to Windows 10 as well?

Should we enter the test mode?

I only have Windows 8.1. So I might have to wait for the 8.1 drivers.

Applies to 10 as well.

[Unclegogi]

shift-reboot and choose smth like "don't check drivers signatures" at startup menu

Boot windows
Install driver
go to device manager, right click on your gpu, disable it.
reboot to safe mode
replace atikmdag.sys
open the signing tool "http://www.ngohq.com/?page=dseo" and sign that file.
open admin cmd window and type "bcded /set TESTSIGNING on"
reboot
Device manager, enable GPU again.
Done.

Thank you, guys, both ways work.
In my case I even did not need to disable/enable gpu, I just signed that mod driver and it works well after reboot.
It works well on win10 and on win7.

[barabeku]

Finally made it with latest Trixx Undervolt

Cards: (RX480)
1x XFX BE ref
3x PowerColor ref

Each card speed 30.3Mh/s = 121.2MH/s total
Has same core (1145Mhz) and mem (2200Mhz)

Enviroment: Box with (25watt) exhaust fan

Total power draw on the wall : 680W (exhaust fan included)

[Eliovp]

For the windows guys.

Also check this out.

WattmOn

Greetings!

[barabeku]

For the windows guys.

Also check this out.

WattmOn

Greetings!

Need a monitor (fake monitor attached)

[Bojcha]

For the windows guys.

Also check this out.

WattmOn
Greetings!

Need a monitor (fake monitor attached)

Active HDMI to VGA and problem solved.

[Bojcha]

https://i.imgur.com/8gCaVyV.jpg
5x MSI 470 8GB
695w whole system

[citronick]

Looks like Heliox is going places.... 

http://cryptomining-blog.com/8228-modify-the-bios-of-reference-radeon-rx-480-for-faster-ethereum-hashrate/

[Lion BItcoin Shop]

https://i.imgur.com/8gCaVyV.jpg
5x MSI 470 8GB
695w whole system

can you use watt kill? because gpu z not showing the real consume power