ANyone try blackcoin with cuda? I am getting around 150khash with a 770gtx. Is that normal?
You should make sure you have the most recent drivers and version of cudaminer. You should be getting more than that. I get 265 with a gtx580. There are specific settings that can increase your hash power using the -m 1 -C 1 and -H 2 flags you can get a slight increase in hashpower. The -H 2 flag is extremely important because it keeps the entire process on the gpu as opposed to dropping certain functions to the cpu. Alternatively when you run auto tune it will give you a number listed as maximum number of warps, that is the number that you can use to generate your architecture multipliers. The auto tune typically will choose the best multiplier for your card when running in scrypt but in some cases does not choose the best option. So it's in your best interest to tune it based on the multiplier you are given and if you cannot find a better setting to then tune it based on max number of warps.
Basically if you are given for example T16x12 (autotune max of 192 warps) from autotune then you should tune within that multiplied number to attempt to find a better setting using multipliers like 64x3 etc. The larger number should never be the number on the right, it will not validate correctly. Secondly if you cant find a better setting you can build your multiplier based on max # of warps from the autotune initial computation output. That would be the next best option. Thirdly you can build a multiplier for any number as long as it does not exceed the max number of warps. So that means if you want you can figure out the matrix for all of the possible settings between 1 and your max warps #. But typically autotune runs through all of these and finds your best option. I have found personally though that in some cases there are errant settings that are more efficient.
