Hi! I've read about 7970 thread a lot and this is one guide that I've followed :
https://bitcointalk.org/index.php?topic=28402.msg1635964#msg1635964My hardware spec : 3x sapphire HD7970 vapor-x
But still, my max hash speed is 512-515. (mining litecoin)
Lot of you manage to hit 650-7xx speed? how to do that?
my config :
setx GPU_MAX_ALLOC_PERCENT 100
cgminer --scrypt -o stratum+tcp://[link] -u [username] -p [password] -w 256 -g 2 -I 13 --failover-only --auto-fan --shaders 2048 --gpu-engine 1150,1150,1150 --gpu-memclock 1600,1600,1600
It will crash if I enter memory clock above 1600 (weird? I've read some can use 1880).
All help is appreciated!