R9 280x 4Mh/s Mining Rig

[Maurizio]

Somebody here with expiriences on saphire dual x r9 280x?

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[uygar2580]

I have 5 of r9 280x Dual-X, Its about 706khash average and 70C per GPU.

[mrugala]

Hello

I habe saphire dual x 2 r9280x, get 730kh/s each.
I tried your settings but wont work, could somebody
who got the 800+ post the whole congif line outta cgminer, please.

best regards form switzerland

I don`t think there ever have been any Dual-X near the 800kh/s mark.
I manage to get 745-750kh/s out of my Dual-X`s. (1055/1500/PT20/i13/cgminer 3.4.2)

Thank, I hope somebody else know a sweetspot for dual x?
Whats the best r9 280x for mining out there?

I'd say 280x toxic, doing 800+ for me.
Still have some in my groupbuy #2, check description ; )

[bigblind]

hey

i got a rig running with 4x R9 280X Gigabytes. One of them is somehow below average and in general i cant get them running as fast as they do on my 3x r9 280x rigs.

The 4x go up to 710-720 while the 3x go up to 775 with the same settings.

Can anybody tell me where the failure might be. I'm running the 4x Rig with 2 Corsair XM850 GOLD PSUs.