That hash rate if it's for scrypt as the op state it's kinda low...2 280x ( in my case ) can do easy 1400+.
Why i have only 1080 on 2 280x?
Where is the rest of power?
How can i fine tune my miner?
If i can't how can i know you are not using all my power and to yo deliver only 60-65% of earnings...
Because that would make no sense as a scam idea.
Not sure what your issue is. You can take solace in the fact that no one else can fine tune their cards to maximize hashrate here.