This new version doesn't do well for my R606. I've tested on my Win7 Desktop and my RPi 3.
9e51f0b
5/29/19 build
Ubuntu 18.04 MSI GT80 Laptop
5 675Mhz 867Ghs
6 731.25Mhz 935Ghs
I've never achieved 750Ghs at Power Level 4 nor approached 1Ths.
Edit: Ubuntu on my laptop does seem to do much better.
Update: I setup the current CGMiner on the Ubuntu side of my laptop and it does seem to do much better. After I finish testing on the Ubuntu side I will repeat the tests on it's Win7 side. This is different hardware than my other Win7 installation on my Desktop PC.