Guys, can you tell me whether my hashrates are OK? Im using cgminer that supports scrypt-jane algorithm. I've read somewhere on the internet, that scrypt-jane hashrate should be something like 75% of scrypt hashrate. In my case, it is not 
. I'm not getting any HW errors at all.
radeon 7970
265 kH/s (WU: 220 kH/s) -- scrypt-jane
760 kH/s (WU: 690 kH/s) -- scrypt
. I'm not getting any HW errors at all.radeon 7970
265 kH/s (WU: 220 kH/s) -- scrypt-jane
760 kH/s (WU: 690 kH/s) -- scrypt
I have HD 7970 and a hashrate about ~300 KHs. I have slightly different parameters in config.
thread-concurrency=18432
gpu-engine = 1100
gpu-memclock = 1625
intensity 13 (not 12!), no hw errors so far ;-)
In general I can recommend the following steps to get good parameters for both, scrypt and scrypt jane:
- Start cgminer without parameters, just pool information and add -I 13
- Stop cgminer, look at generated bin file and write down the numbers after tg, this is your new starting thread-concurrency value.
- Start cgminer with new thread-concurrency value and increase this value by 2048 until cgminer doen't start anymore. Than you have your perfect value.
- In cgminer start with default values for gpu (mem and engine).
- Increase gpu-memclock in values of 25 until system crashes, step back 25 and set this value as parameter for gpu-mem.
- So we have the max gpu-memclock value, start increasing engine speed by values of 10 (wait 20 -30 sec)
- Repeat increasing engine value until your hashrate drops siggnificant, decrease value until you find a spike in hashrate.
- Now we have thread-concurrency, engine and memclock set, now you can play with intensity and find a good value.
- You're done!
With theses steps I found scrypt jane hashrate ~300KHs and scrypt hashrate ~750KHs with Radeon HD 7970. Hopefully it can help you.
Edit: I used patches from https://sites.google.com/site/rmdavidson/ and compiled a cgminer with the "ut" patch. Makes it much easier to find the needed values automatically.