Having the same problems others reported with 750 Ti. Works fine with v1.0.0a.
[19:41:44][0x00000cfc][error] miner#0 | CUDA error 'unspecified launch failure'
in func 'eq_cuda_context::solve_sync' line 1563
[19:41:44][0x00000cfc][error] miner#0 | CUDA error 'unspecified launch failure'
in func 'eq_cuda_context::~eq_cuda_context' line 1667
[19:41:44][0x00000cfc][warning] miner#0 | Thread detected runtime error, restart
ing in 5 seconds...