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1  Alternate cryptocurrencies / Mining (Altcoins) / Re: PhoenixMiner 2.3: fastest Ethereum/Ethash miner with lowest devfee (Windows) on: January 18, 2018, 12:54:58 AM

Ive dual mined beofre yeah , mild OC on the cards but they are only a few months old

I'm talking about memory overclocks.

You said 29.8MH/s. You need to overclock quite high to get that, not a "mild" overclock. Plus just a few months dual mining could have your cards start working weird.

29 mhs is a standard 2000 mem oc for rx cards its nothing out of the ordinary
core and temps are low and cards are undervolted as well, I dont see how dual mining can have the cards
‘looking’ wierd as you say , I dont think they are taxed that much

Hello. I agree with DavidC1. As I had the same issue with an MSI RX 480 Gaming X and ASUS RX480 Strix (both Samsung memory chips). After trying with different drivers and claymore builds I was able to fix it by downclocking the memory to 1950 Mhz. It seems that going above 1950 triggers the issue again.

PS: I'm using 1500 straps in both vcards.
2  Alternate cryptocurrencies / Mining (Altcoins) / Re: Mining on Ubuntu with AMD r9 280x & 270x on: July 09, 2017, 05:09:09 PM
Hello I want to mine on Ubuntu 17 with 2x r9 280x GPU, and on second pc 1x 270x GPU with also Ubuntu 17.
But I found out that fglrx (sorry if misspelled) aren't supported by new kernel/Ubuntu, and that there are new drivers - AMD GPU-PRO.... but they don't support it.

Is there any way to mine on those?
When I run Claymore miner it says modprobe fglrx not found (or something like that).

I want to mine ZCash (and maybe ETH/ETC with something later)

Thanks

Hello, and you are right, there is no support and no way to get the old or the new (fglrx or amdgpu-pro) driver to work with the latest version of Ubuntu and your 280x. I had two Asus R9 280x (amazing and beautiful cards) and tried all options for the last two months but every path had a lockdown. Also, there is no support for R9 280x in the amdgpu-pro driver so you have to select the downgrade path (Xorg, kernel, libraries etc..). The best option for you is to install an old (and supported) Linux distro for fglrx drivers.

Lastly, there is unofficial support for Tahiti cores in amdgpu driver (open source one) and I was able to test it in gaming, however, I had zero luck trying to run OpenCL apps with it.

Regards,
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