My miner 6 x Sapphire r9 280x 11221-00-20g

[albasalo]

Hi at all,

I'm just a new miner and i have left many night hours dedicated to finding the right balance between core clock and mem clock I found the following configurations.

The stability varies from card to card and to get it to go down with the core clock 5/10 Mhz until you get the right balance for this, the following values ​​are relative to my cards and may vary with your own.

UnderClock

With Hynix mem:

Voltage  -  Mem Clock - Core Clock -    Hash Rate    - Watt  -  Ratio    -   Total Watt

0.925v         850Mhz       800Mhz       595/600Kh/s     160      3.6khs/w       1000w circa
1.025v         945Mhz      1000Mhz      660/665Kh/s     195      3.2khs/w       1200w circa
1.050v         980Mhz      1000Mhz      700/705Kh/s     220      3.0khs/w       1350w circa

With Elpidia i have find this:

Voltage  -  Mem Clock - Core Clock   -    Hash Rate    - Watt  -  Ratio    -   Total Watt

1.075v        1000Mhz     1250Mhz        700/705Kh/s     225      3.0khs/w       1390w circa

Bius version used for underclocking is  041 for hynix and elpidia

Video Card:

Sapphire r9 280x Dual-x 11221-00-20G
I hope that serves to someone and if you want I can also post the modified bios ..

you can offer me a beer:

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