I am mining ArtByte and LiteCoin using a single GTX 1070 GPU. Everywhere on the internet I am reading that such a card can achieve 20+ MH/s. My card only gets as far as 680 khash/s. Am I missing something? How to investigate this issue?
For ArtByte I am using:
cudaminer 2014-02-28 (beta).
ccminer 2.1 for nVidia GPUs by tpruvot@github ***
Built with VC++ 2013 and nVidia CUDA SDK 8.0 64-bits