I installed the last nvidia driver and ccminer x15 still not working on my GTX690
What was the latest release which worked for you ?
ccminer v1.2
that's strange, it is made from v1.2 (the latest one), at least x13 should work... (as there is no change outside x15 )
Can you check x13 work on v1.2 ?
maybe you built the unofficial release against CUDA 6.0 which up's the minimum driver version requirement