EDIT: I am using Asus R9 280x DC2 TOP version 1, I am getting around 780kh/s for each card.
May I ask your cgminer configuration, please?
+1
780kh/s seems very high
Not that special. Seen ppl doing 800 on a 280x, but those are hard to find...
I get 773kh/s on my 2 280x dual sapphire's @1110/1800 (didn't up the voltage though)
How did you do that? I have 4 280x dual sapphires and whenever I turn the clocks up that high, they crash. I can't go over 1050/1500, and that gets me 730 khs.
My rigs were doing great, but I tried switching to the useast server and my rigs started doing bad... lost 1,500 khs... I tried switching back and it's not doing much better.