Can't get over 650 Khash with a 280x sapphire Vapor-X 11221-02-40G

[filipe3x]

Anyone with the same problem here?

I got the 8+8pin power version. I heard people saying these are crap for mining.

I am using these configs right now:

Code:

-I 13 -g 2 -w 256 --lookup-gap 2 --thread-concurrency 8192 --gpu-engine 1000 --gpu-memclock 1500 --temp-target 70 --auto-fan

(from http://www.cryptobadger.com/2013/12/radeon-r9-280x-gpu-mining-results/)

thanks!

[vpasic]

Set gpu clock speed to 1040!