When I do a System Stability Test on this Thinkpad W541 with i7-4710MQ, it runs for a couple minutes with throttling between 0% and 20% averaging about 10%, and then all the clocks drop down to 798Mhz for a minute - then they go full speed again for a couple minutes before dropping once more.
Sometimes when I'm playing a game it will suddenly turn into a slideshow, so I guess this is what's happening.
I presume this is some kind of overheat protection beyond simple throttling.
Is this to be expected with this system?