Quote from: cmbitmining on April 29, 2013, 10:03:34 PM

I have been adjusting settings for a couple days now. I am running a 5770 with cgminer -scrypt on win 7x64 with the following
--worksize 256 --gpu-engine 688 --gpu-memclock 1100 --shaders 800 -g 1 --thread-concurrency 8000 --intensity 18

I have adjusted the gpu-engine and memclock to the sweet spot above. I do see others claiming around 200kh/s but I can't figure it out. Any help/info would be appreciated. Thanks,

Try --gpu-engine 880 --gpu-memclock 1100.

You want your 5k series cards overclocked at a certain ratio. 1100 multiply by .8 = 880. Also, lower your thread concurrency

https://bitcointalk.org/index.php?topic=117221.0

Quote

Mining Litecoin

The major factor which impacts hash rate/hardware errors is the thread_concurrency. The second most important factor for some cards is the ratio of core speed to memory speed. Typically optimum values of thread_concurrency are a multiple of 64 and vary per card and per card family (see below). The (core speed/memory speed) quotient should be 0.8 or less for 5xxx/6xxx cards and 0.7 or less for most 7xxx cards. Some evidence suggests that different 7xxx cards may have different ideal core:memory clock ratios, too.

Recommended thread concurrencies for
57xx cards: 2368-4096 (3200 is common)
58xx cards: 4096-8192 (5600, 7168, and 8000 are common)
5970 card: 4096-8192 (5632 or 8000 are common)