i have 2 sapphire r9 290s using 4 gigs of ram, a sempron 145, and a asrock 990fx extreme 4 mobo
using cgminer 3.72 with these settings
-I 13 -g 2 --gpu-engine 1000 --gpu-memclock 1250 --thread-concurrency 8192 --gpu-fan 85
right now those settings only are getting me 513kh per card. i know these get 800kh out the box so its gotta be a settings issue.
also if i close cgminer windows crashes with a bluescreen and restarts the computer, but as long as i dont close it it is up and mining.
if i increase the intensity i get all HW errors.
any help is greatly appreciated