Right-click on “This PC” from the left side panel, then choose “Properties”. Click on the “Advanced system settings” link in the left side panel of the new window you opened. Press the “Settings…” button in the “Performance” section. Make sure that the “Adjust for best performance” option is selected.
Navigate to the "Power," "CPU," "Advanced" or similar menu on the BIOS setup screen to find options to adjust the CPU voltage, CPU clock or front side bus (FSB) settings. BIOS options differ depending on the BIOS version, manufacturer and motherboard setup, so the menu names and available options may differ.
Undervolting your CPU is usually safe. That is not to say that it can't be done wrong, though. If you happen to undervolt your processor too much, your computer may experience instability, crashes, and lowered performance. Most common issues include the blue screen of death (BSOD) and freezes.
CPU underclocking
This invariably comes at the expense of some system performance. However, the proportional performance reduction is usually less than the proportional reduction in clock speed because performance is often limited by other bottlenecks: the hard disk, GPU, disk controller, Internet, network, etc.
Regularly running maintenance tasks such as disk cleanup, disk defragmentation, and error checking can help improve the performance of a computer and lower CPU usage. This is done by removing unnecessary files and other data that may be used by malware and organizing data on the hard drive.
Too Many Background Processes
Since Windows itself needs some background processes to run, many background processes will run on the computer at the same time. As you install the programs constantly, there will be more and more programs on your PC and it will cause high CPU usage.
If your CPU use temporarily spikes to 90% or 100%, that's normal if you're doing intensive tasks like high-end gaming or graphic design. So long as your CPU calms down after you're done, there's nothing to worry about.
The truth is, no matter how new or expensive your processor is, its performance will decrease if you give it too many tasks to deal with. If you constantly have a lot of high-resource applications running on your computer, you may notice your computer starting to move a bit slower.
Why is my computer so slow? If you notice your computer starting to slow down, it's likely because you have too many programs running at once. Powering several programs at once takes a lot of processing power, impacting performance and speed.
In theory, any CPU can be overclocked. But overclocking can be done only by raising what's called the “base clock” — that is, the clock speed of your motherboard and your entire system (including the CPU, RAM, and PCI Express devices, such as sound cards or graphic cards).
Simply click the battery icon in the taskbar at the bottom right of the desktop and adjust the slider to select the Power Mode. The level of throttling increases as you scroll the power slider from left to right.
This can be caused by Task Manager glitches, background processes, malware, and even your antivirus software. The best way to fix these issues is to go through the programs in Task Manager and investigate which are using too much CPU power. Your CPU has a lot of responsibilities when it comes to running your PC.
Normal CPU usage when you aren't running any software or loading web pages is around 1% to 5%. The following activities may create the following CPU levels. These are all considered "good" CPU usage so long as you know the activity causing it.
You can also reduce CPU load by adding more RAM, which allows your computer to store more application data. This reduces the frequency of internal data transfers and new memory allocations, which can give your CPU a much-needed break.
However, if you consistently see CPU usage remain at a high level (80 percent or greater) for prolonged periods, the performance of your system or application will suffer. For that reason, it's important to understand the cause of sustained high CPU usage to be able to correct the problem, if possible.
If your CPU usage is much higher than your GPU usage, that indicates a CPU bottleneck, and vice versa. Anything below 50% utilization is considered low, 50% to 70% is normal, and 70% and up is high.
Running a CPU at consistently elevated usage levels limits the processing power left over for additional tasks and exposes your processor to potential heat damage. It may also indicate inefficient use of computational resources.
One way to underclock your computer through software is by using a third-party software such as ThrottleStop or Intel XTU (Extreme Tuning Utility). These programs allow you to adjust your processor's frequency and voltage settings to reduce power consumption and lower temperatures.
Close out background applications. Background applications are one of the biggest culprits of a CPU bottleneck. A CPU typically runs at between 2% and 4% usage when idle, 10% to 30% when playing standard games, and up to 70% when playing more graphics-intensive games.
The CPU always degrades, of course it degrades quicker with higher temperature and higher voltages.
In conclusion, undervolting is a great way to reduce power, heat, and noise from your system. You'll often be able to maintain the same or even better clock performance, too.