RX 480 BIOS MODS Power draw + undervolt + OC/UC results - page 2.

greaterninja

hero member

Activity: 924

Merit: 1000

Flashing BIOS over and over can be time consuming.
I've successfully reduced power draw by 20-25 watts at the wall outlet.
Stock Total System power draw was 205 watts/hr @ the wall with 1 - RX 480 card in.
Total System power draw is now 180-185 watt/hr @ the wall

Mining 22.5 to 23 mh/s on a 4gb Sapphire rx 480 in Ubuntu version 16.04 LTS.
In Windows the card would probably run 24 to 25mh/s.

I believe there is a bit more room to go. Gonna test a bit more then probably take a break as its nice outside Tongue

Naimon

newbie

Activity: 30

Merit: 0

Quote from: greaterninja on July 15, 2016, 08:16:00 AM

I've created a custom bios for the rx 480 and successfully flashed it onto a ubuntu test machine. Will be testing it for the next day or so.

My goal will to lower temps and power draw ~20% or more.

VERY interested in your results. Best of luck!

greaterninja

hero member

Activity: 924

Merit: 1000

I've created a custom bios for the rx 480 and successfully flashed it onto a ubuntu test machine. Will be testing it for the next day or so.

My goal will to lower temps and power draw ~20% or more.

roitpls

newbie

Activity: 20

Merit: 0

@jstefanop
Do you mind sharing your settings?
Grin

jstefanop

legendary

Activity: 2188

Merit: 1401

Quote from: adaseb on July 10, 2016, 12:27:18 PM

Yeah in linux you can run any type of bios, while in windows if you try to run those modified bios's it will just crash on startup.

jstefanop, how much in total from wall ?

120 watts at the wall for one card...180 total system power.

philipma1957

legendary

Activity: 4354

Merit: 9201

'The right to privacy matters'

Quote from: adaseb on July 10, 2016, 12:27:18 PM

Yeah in linux you can run any type of bios, while in windows if you try to run those modified bios's it will just crash on startup.

jstefanop, how much in total from wall ?

I get 81 and 85 watts on gpu = 166 watts for 2 rx 480s and hash at 24.3 for each.

but that gpu-z translates to about 250 at the wall

well 300 at the wall and take off 50 for the pc.

so if my 166 watts is 250 at the wall

an 83 watt gpu-z = 125 watts at the wall for 24.4

he is 101 watt gpu-z add 42 watts he is just about 143 watts at the wall for 29.4

125/24.4 = 5.12 watts per mh me

142/29.4 - 4.86 watts per mh jstefanop

keep in mind I am guesstimating his at the wall number.

but i think he is doing just under 5 watts per mh while I am just over 5 watts per mh

Eliovp

legendary

Activity: 1050

Merit: 1294

Huh?

Quote from: adaseb on July 10, 2016, 12:27:18 PM

Yeah in linux you can run any type of bios, while in windows if you try to run those modified bios's it will just crash on startup.

jstefanop, how much in total from wall ?

Yeah i know, signature check :/

adaseb

legendary

Activity: 3808

Merit: 1723

Yeah in linux you can run any type of bios, while in windows if you try to run those modified bios's it will just crash on startup.

jstefanop, how much in total from wall ?

Eliovp

legendary

Activity: 1050

Merit: 1294

Huh?

Quote from: jstefanop on July 10, 2016, 09:02:40 AM

never said anything about running crap windows Roll Eyes

Quote from: jstefanop on July 06, 2016, 02:06:26 AM

squeezed a few more MH out if it with some BIOS hacks Cheesy

Interesting..

What clocks have you set?

I assume you expanded the last strap to be able to run in a higher timing than 2000?

14.04?

Greetings!

Edit: just saw your post in the other thread.

Guess i need to test on linux ;-), thx!

jstefanop

legendary

Activity: 2188

Merit: 1401

never said anything about running crap windows Roll Eyes

Quote from: jstefanop on July 06, 2016, 02:06:26 AM

squeezed a few more MH out if it with some BIOS hacks Cheesy

Eliovp

legendary

Activity: 1050

Merit: 1294

Huh?

Quote from: jstefanop on July 10, 2016, 12:58:13 AM

Yep...running custom BIOS on ubuntu 16.04..29MH @ 120 watts.

Let me step in here.

There is no way to pass signature check 'yet' .. So a "custom" bios <-- Not possible (yet)
Reference: Here

Trust me, i've tried.. several times, thought i'd cracked it but no.. it's not yet possible.

The only thing that is possible is to modify the amd drivers to be able to go higher than 2250 mem.

Which i have done and which i have proof of.

Here:

I would love to see some proof of that 29+ Mh..

Greetings

jstefanop

legendary

Activity: 2188

Merit: 1401

Yep...running custom BIOS on ubuntu 16.04..29MH @ 120 watts.

greaterninja

hero member

Activity: 924

Merit: 1000

I am creating a thread as we need to get some momentum going on RX 480 BIOS mods.

So far we do know that there is a way to unlock RX 480 4gb cards and turn them into 8gb cards.

However, now we need solutions to undervolt and overclock GPU + increase fan speed.

So, anyone have any success on bios mods or Ubuntu 14.04 or 16.04?

Topic: RX 480 BIOS MODS Power draw + undervolt + OC/UC results - page 2. (Read 11564 times)