Just recently I switched over to a 5870 for mining and gaming. I'm currently mining LTC but only getting 300 khash/s, which I think I should be able to get over 400...I've tried overclocking with Sapphire Trixx as that is what I was using previously, but all it does is crash the card so I'm using the program that came with it. It will only let me overclock to 900 core and 1300 memory which I think is part of the problem...I'm currently running Reaper at worksize 256, aggression 18, threads_per_gpu 2, sharethreads 32, lookup_gap 2, gpu_thread_concurrency 5632. Any recommendations to get more out of my card?
Have you tried cgminer?
