ethOS 1.3.3 can run Tahiti/Tonga/Fiji with 50%-90% hashrate increases.

[Blast77]

http://ethosdistro.com/kb/#fglrx-amdgpu

Increasing Hashrate on Tahiti/Tonga/Fiji GPUs with AMDGPU

As of ethOS 1.3.3, you can increase the hashrate of older GPUs (Tahiti/Tonga/Fiji Series) by switching the driver from fglrx to amdgpu.

List of Tahiti GPUs : https://videocardz.net/gpu/amd-tahiti/
List of Tonga GPus : https://videocardz.net/gpu/amd-tonga/
List of Fiji GPUs : https://videocardz.net/gpu/amd-fiji/

NOTE! If you do not have any of the above GPUs, DO NOT PROCEED with the below guide. Please also note that most hashrate improvements are limited to ethash mining.

Follow the below instructions to set your driver to amdgpu.

In your config, set legacydriver [worker] amdgpu / globallegacydriver amdgpu
Then, set miner [worker] claymore-legacy or globalminer claymore-legacy
Run: putconf && sleep 30 && r

After your rig reboots, your Tahiti, Tonga, and Fiji GPUs will have an increased hashrate.

[nitrobg]

What hashrate increase are we talking about?

[Blast77]

What hashrate increase are we talking about?

As stated in message subject, 50-90% increase.

[melpheos]

What is this sorcery ? 

[Blast77]

What is this sorcery ? 

See this link for a full detailed explanation:

https://i.imgur.com/fIdZ40X.gif

[vladutz1186]

Yeah, there are more bugs, I think ... when I switch to "globallegacydriver amdgpu" system works verry slow and claymore found only one GPU , with 1.2 mh/s. lol

With fglrx driver work fine, but same hashrate like before ...

[nitrobg]

What hashrate increase are we talking about?

As stated in message subject, 50-90% increase.

Talk to me in numbers, percentage means nothing.

[Rock and Paper]

i have 1 r9 Fury running at 30mhs, so will it run around 45 - 57 mhs?

[adaseb]

I don't want to click the link since it's from a newbie and could be a virus but what he is talking about can be true.

When ETH came out in Oct 2015, the R9 280X hashed at like 28Mhs and it suffered a bug thrashing error and every new DAG caused a slowdown so a year later it only hashed at 22Mhs and a year after something like 16Mhs.

This same issue hit the RX series about a year ago but AMD issued a fix with the compute drivers. However they didn't care to issue a fix for the legacy GPUs like the older 7970/280X.

It will most likely consume 250Watts for those 28Mhs but it would at least give some life back to the Tahiti GPUs.

However they can't mine ETH anymore since they are all 3Gb but some of the alts like Music or Ubiq

[zhzz]

However they can't mine ETH anymore since they are all 3Gb but some of the alts like Music or Ubiq

there are R9 380/290/390 which are 4GB

also there is no link from the OP. It's a simple instruction on changing settings. I sold all my Tonga GPUs what a shame.