just a report

ver 1.7 on my rig reduce my haven hashrate compared to v1.68

for example : on Asus rog rx580 8gb using:

> 1.68 the hashrate started @8xx-9xx and going up stable @1050-1052

> 1.70 the hashrate started @98x/99x/1000 and stable @1010

it is also happen on other 470/480/570/580 from other brand.

so I go back to v1.68

Thanks.