Apologies if I've missed this somewhere in the thread but I've noticed an interesting behaviour of my 1070 GTX. Basically I normally get around 272MH/s with 1.8.2 but have noticed sometimes it has been dipping to around 225MH/s and I couldn't figure out why. Anyway I did a bit a digging and noticed if the Memory Usage on the GPU (monitored with GPU-Z) drops below around 512MB the GPU Core Clock drops down to a default speed of around 1531MHz. If I open a web browser or something which increases the GPU memory usage it pushes up the GPU core clock up to max and I get 272MH/s again.

Anybody else seen this? I'm using the latest NVIDIA drivers 372.90

TomDD