I actually do watch memory errors, thats why me and you have worse results than some scammers 
I have 13.8-13-9 with the same card as you
I have 13.8-13-9 with the same card as you
So, I'll have to fight again with Hynix to get close to your 13.8 Mh/s.
It was actually about 14.4 until recently, only thing that changed meantime is new epoch,
but since my micron based Gigabyte took almost no drop, I'm a bit confused here
Can Claymore be to blame? 9.7 is better for nVidia, but worse for AMD, I suppose.
I could be wrong, but I did see that they will be releasing a new version of Claymore soon to go along with the new drivers being release by AMD. Will be interesting to see what it does to speeds.
Claymore got released, but we still have to wait for AMD...and probably even more new claymore too, as clock/fan/temperature settings
seem to still be a problem