Hello wolf0. How to use wild_keccak_amd.cl ?
Copy the new kernel in the same directory with the binaries (and the old kernels). Change the kernel name in miner_conf.json to the new one.
How to optimize the config of solo ? I have solo but found on block for 2 days, 5*270 kards.
If you have a thread_delay of 2000 or so in miner_conf.json, there's probably not much more to do. It is typical to have a big variance when solo mining -- sometimes you find two blocks in a short time, sometimes there's a long dry season.
Also, you can probably increase the GPU frequencies from normal. This algorithm is very easy on GPUs, so there is less danger of overheating. RAM speeds are not very important for this.
The network Difficulty is 166962161187 ,but the default difficult config is 16777215. Should I chang it ?
No need to change it. The GPU miner will find shares at the low difficulty, but the network only counts blocks with its own difficulty. Having those low-diff shares is good for checking your GPU works, and calculating the hash rate.