Can someone explain this "64x2" "S27x3,28x4" thing to me or point me in the right direction on reading up on it??
I have a 580gtx and i'm trying to figure out the best set up
well i did not figure out the meaning, but if you run it and let it autotune, it will choose automatically what's the best one (then you can add the flag in the batch file, like -l 112x2 for me)
112x2 means it throws 112 blocks at CUDA, and each consists of 2 warps. A warp is a group of 32 threads.
So in total it computes 112*2*32 = 7168 hashes in parallel in a single CUDA kernel launch.
And because the scrypt scratchpad is 131072 bytes long, this would consume 7168*131072 bytes of memory
on the card. That's about 917 MB.
cheers! are there guides for these things? or is it just trial and error? Sorry i don't want to annoy you too much but do you know what would be some settings to throw at a 580gtx to see any improvement or should i just let the auto tune take care of it and not worry?