I have an Acer Predator laptop that has an i7 7700HQ and a GTX 1060 6GB. It has always run a little hot and loud, so I’m trying to fix that with undervolting.
I will be using Intel’s XTU software for my CPU. An undervolt will be applied and then Cinebench R20 will be ran to get rough performance numbers. I will be using XTU as a hardware monitor.
Here’s a table of my Cinebench results.
At stock voltage, my CPU’s clock speed, temperature, and power consumption would fluctuate wildly. I suspect I was hitting a combination of temperature and power limits. Lowering the voltage made all those stable, which increased my score.
I was impressed with the temperature and power improvements. Going from -40mv to -150mv lowered my temps from 87C to 76C and my CPU power from 36W to 27.5W. Very impressive!
I ran Prime95 with small FFTs at varying voltages for stability checks. I saw some interesting results on the hardware monitor. At stock, my clock speed rarely jumped above 2.79GHz, but I was constantly hitting thermal limits. The power, temperature, and clock speed graphs would have occasional spikes. At -50mv, there were more spikes, but less throttling. At -100mv, the spikes became very regular to the point that my graph looked almost like a sine wave. There was no thermal throttling. At -150mv, the spikes stopped. I hit 3.38GHz, 39W, and 88C and stayed there.
I will need to run more stability tests. Right now, I’m happy with this undervolt, so I don’t think I will try to push it any farther.
Next time, I will try it on my GPU.
"There are no solutions, there are only tradeoffs"
- Thomas Sowell