Hello my acer predator helios 300 is boiling

Follow the links in my signature to under volt GPU too. This too helps cool significantly. Set your CPU UV to 120, instead of 135.
Tune your windows disabling any unnecessary services.
Set up a custom power plan; windows 10 is notorious to pushing back to high performance plan at will.

UrWorstNytmare said:

By default both option is set to aggresive in high performance mode but if you disable this it will turn off your intel turbo technology and limit the cpu speed to base clock. And even in ultra settings you can play game at 60fps smoothly, before  this my cpu temp goes max 98 C and after  applying this my cpu temp is below 70 C always. Hope this will work for all of you also  

Sorry, my english is bad.

This will disable turbo from never turning on, effectively limiting performance of processor to its max non turbo speed; pretty much achievable by simply setting processor max value at 99 instead of 100. This limits performance under high levels of loads.

In fact, I would recommend setting the value to disabled on battery and to passive when on power; this will allow for turbo speeds less often still turning it when absolutely needed.

KedWalker said:

Hi, i use acer nitro 5 with i5 8300H / GTX 1050
1. I change thermal paste with Arctic MX-4
2. I undervolt -0.150v

My Temp will be average 70-85c while gaming with coolboost ON with AUTO FAN MODE

Use MSI Afterburner and undervolt the GPU - this will push temps down by another 5 to 10 degrees.