I have serious problems mining with these cards.
On Scrypt, i can get 160khash on 7770, 200khash on 7790.
On N-Scrypt. Nuffin' works.
ASUS HD7770-DC-1GD5-V2
Using
@echo off
color 0A
setx GPU_MAX_ALLOC_PERCENT 200 (changing this to 100 doesn't change much)
setx GPU_USE_SYNC_OBJECTS 1
vertminer.exe -o stratum+tcp://pool:port -u worker -p pass -I 15 -g 1 -w 256 --thread-concurrency 7300
I get 3-4khash.
For HD7770, try this: -I 12 -g 1 -w 256 --thread-concurrency 8000
It works for me, and get about 75KH/s.