On the topic of 3DMark and how it is affected by RAM speed.
1) RAM speed really affects 3DMark on APUs.
The same A10-7850k system of which I posted the 3DMark11 score would net only ~1800 Pscore with single channel DDR3-1600. Graphics score would drop by almost half. Need to find that result...
2) RAM speed doesn't affect as much if discrete GPU.
RAM speed still affects 3DMark runs, but nowhere as much as it does for APUs. I have 4 more results, 3dmark11 and firestrike of a Ryzen 5 1300X, GTX 1050 Ti system that I built for a customer. One set of runs is DDR4-3200 16-18-18-35 dual channel 2x4GB, the other set of runs is DDR4-2400 14-16-16-31 single channel 1x8GB. The scores are higher on the dual channel system, but not that much.
DDR4-3200 dual channel results:
https://www.3dmark.com/3dm11/12621879
https://www.3dmark.com/fs/14776506
DDR4-2400 single channel results:
https://www.3dmark.com/3dm11/12622776
https://www.3dmark.com/fs/14772205
I guess we will just have to wait and see...