I'm running Claymore 6.2 on Windows 10 (WMDD 2.1), GTX 970 with CUDA 6.5 and 347.52 driver. My hashrate for ETH is 4.3 and 172 Mh/s for Sia. I've tried a couple of different drivers but they usually all result in low hash rates. Anything else I can do aside from installing Windows 7?
Try these drivers, I not sure if they work on 970's, mainly for 1070's and 980's
Follow the readme file, you need to swap an Nvidia file are extracting drivers to the C drive on Windows
Release by Claymore:
https://drive.google.com/drive/folders/0B69wv2iqszefQVRfOEhWS0FCdUE