I got a bit moar of dem hashes out of a 1700X:

595 H/s @ 3.7GHz @ 1.2V:

http://i.imgur.com/TSzkeM2.png

650 H/s @ 4.0 GHz @ 1.42V:

http://i.imgur.com/DZnFMdu.png

Affinity in the config.txt set to even numbers of threads (0,2,4,6,8,10,12,14) and nothing else can be running in the background or the hashrate takes a big hit.