What is the fastest single card?
dont forget 7990 uses alot of power and will get very hot.
I've got R9 280x it's get 800Kh/s I got 3
And i think it's the best choice.Not if you're Linux savy and can compile Reaper.
--no-submit-stale -I 13 --gpu-engine 750-1150 --gpu-memclock 1800 --thread-concurrency 8192 -g 2
http://s2.postimg.org/ihvcraxjc/conf.jpg
