I've played a few hours of CS:GO and noticed no change, but then CS:GO
mostly worked beforehand. I've also tested 30 minutes of Fallout 4 (Ultra, UHD) and it seemed about as I remember.
I don't have time to test games at the moment. However, I did go out and leave RealBench running on a stress test. I chose 8GB RAM for 4 hours - it passed without issue (this was a problem beforehand).
This is very, very odd.