Threads per block. You need to recompile for each time you change it, but a change of values will speedup alot. See my edited post above...
When you find the optimal values for your card, please post it and I will change it as the default setting..
The 750ti, and the 970 settings should be pretty good. (5-10% faster than DJM's version on the maxwell)
The other models probobly need a different launch config. I haven't done it yet because lyra2v2 hasn't been profitable.
And another thing....
My modded kernal is slower on linux and on older cards.
(compute 3.0/3.5 Might not work).
I put for "750" the same setting as for 750ti
tpb = 16;
And with -i 19 it takes 811mb of gpu memory, 14-18% mem controller load and
4440khs/s. Nice!
Will send some beers soon ))
upd: directly from cryptsy from my poor gtx750 ))) 0.02btc minus taxes )))
https://blockchain.info/de/tx/5e0374309f65e38dabff5cd6a12fb6ea91I4fdb90eda3calc752dde3cb76217b