Should I use ThrottleStop?
Lenovo gave the Y510P a special feature. In my opinion, it is a big bug. Lenovo thought it would be OK to disable Intel Turbo Boost when the Nvidia GPU is active. This leaves the CPU running at 2.4 GHz which is way less than the speed it should be running at. To fix this problem, set the FIVR Non Turbo Ratio to 1. This one adjustment will make a big difference. If you need more CPU performance, check the Overclock option and set the Turbo Ratio Limits to 36, 35, 34, 34.
I have been using those ThrottleStop settings on my Y510P for about 6 years now. No stability issues whatsoever. For maximum CPU performance, it is a must. I have put my laptop through more abuse than you can imagine. It still runs great. Not sure why some people think ThrottleStop is dangerous. There are over a million downloads a year with very few complaints. Most users are very happy with the positive difference it can make.
I would also encourage you to use ThrottleStop to undervolt your processor. A setting of -50 mV for the core and the cache is a good place to start testing.