Umm I think it's a coffee lake i5. Or I might be not understanding what a K i5 is...
For desktop PCs, the heatsink (radiator) dispensers the head from the processor. Upgrading the heatsink will allow more heat to be dispensed (Fan and/or liquid cooling) at higher rates keeping a cooler CPU.
But for laptops removing the heat is harder and we'll, not orthodox to upgrade them, and not sure if you can. It also voids your warranty and takes time to make it the right power ratio etc. Lol
Good choice with the 1060, it's great value and for a laptop.
Also, don't forget to change the Power settings when you want to play games to Performance/gaming mode.
The Power saver bottlenecks the performance really hard