Ok, my 2 systems (using Blender 2.78a 64bits, Win10 x64 fully updated, new Ryzengraphic_27.blend with default 150 samples):
1- 1m37.46s
Skylake Core i5-6600 (running at 3.63GHz with max power package 37W). Asrock Z170Extreme4 + 8Gb DDR4-2133 Kingston dualchannel
2- 2m17.36s
Sandy Bridge Core i7-2630QM, Acer Aspire 5750G also with 8Gb DDR3-1333 dualchannel. It starts at 2.6GHz (2.594GHz to be exact) using 46W (throttlestop monitoring, same as Skylake system), then drops to 2.4GHz using 40W, so 2.45GHz@41W average or so.
Using Experimental version dated Dec 11, 2016 (also from blender website):
1- 57.86s, Skylake i5-6600 this time using 42W
2- 1m42.81s Core i7-2630QM, using 44W. Again, starts at 2.6GHz using 48W, then drops to 2.4GHz using 44W, and last drops to 2.3GHz using 42W. 2.4GHz@44W average approx.
Screenshots here:
https://1drv.ms/i/s!AjqAFTn4xM0Zga9z4n8bxyoHpalT4Q
(yep, I know, I'm using different Throttlestop versions, but 6.00 doesn't work with Skylake and 8.30 works worse than 6.00 in my old Sandy)
Byes