--gpu-memclock 1600
No point in this
I run my 5850 (stock 725/1000) at 800/350
Downclock memory and save lots of power
Yeah, although I think you can clock the memory too low. With a 5870, memory at 600 MHz or 1100 MHz makes no difference hashrate-wise, but if I clock lower than 600, the hashrate drops...