How to Limit CPU Power for Gaming PC

What a CPU power limit is

Every processor is designed to operate within a certain power envelope, expressed in watts. That envelope is controlled by a power limit, which is the maximum amount of electricity the CPU may draw at any given moment. The processor and the motherboard work together to enforce that cap, letting the CPU boost its clock speed until it hits the limit.

A power limit is not a fixed number. Most systems allow you to adjust it, either upward or downward, depending on what you want the CPU to do. Lowering the limit makes the processor consume less energy, while a higher limit lets it draw more for demanding tasks.

In Windows, the setting is called the maximum processor state, and it appears in the power plan's advanced options. In the motherboard firmware, the limits are often labeled with names like PL1 and PL2 for Intel processors, or TDC and TDC for AMD processors.

The concept of a power-optimized processor isn't new. Intel's naming guidelines include a suffix, such as the letter T for desktop processors, which signals a design focused on lower power consumption. You can see this in the best Intel CPUs for gaming guide. That shows how power limits are a recognized part of how CPUs are specified and used.

Why lower the CPU power limit on a gaming PC

On a desktop gaming PC, the CPU is not always the component doing the heaviest work. When you play at 1440p or 4K, the graphics card typically takes on much of the rendering load, leaving the processor with a more moderate task. In that situation, a lower power limit may be entirely sufficient for your play. The [best 1440p gaming PCs](/best-1440p-gaming-pcs/] are a good example of systems where the GPU carries the load.

A lower power limit can also help if you have a compact build or a power supply sized for average load rather than peak demand. By keeping the CPU's draw within a smaller range, you can avoid exceeding the power supply's comfortable output. That is a power-management choice, not a performance claim.

You might simply want the PC to run with less energy from the wall, which reduces its overall power footprint. Windows itself includes energy recommendations, as described in the Windows 11 comparison page, and adjusting the maximum processor state is one way to act on that idea.

Finally, if you stream while playing, the graphics card can handle video encoding using its dedicated encoder, as NVIDIA's streaming page describes. That takes a significant load off the CPU, meaning you can lower the CPU power limit without worrying about the extra work of software encoding. For systems built for this, see the best gaming PCs for streaming guide.

Setting a CPU power limit in Windows

The simplest way to limit CPU power on a Windows gaming PC is through the power plan. Open Control Panel, go to Power Options, and choose the plan you're using. Then select Change plan settings and Change advanced power settings.

In the advanced settings window, find Processor power management and expand it. There you'll see Maximum processor state. Set a value lower than 100 percent, such as 99 or 90, and the CPU will not boost to its highest frequency, which reduces its power draw. You can set separate values for plugged-in and battery operation on a laptop, but on a desktop the relevant one is usually the AC power option.

A value of 100 percent allows the processor to use its full boost capability. Dropping it to 99 percent is a common starting point because it disables the highest turbo state while keeping normal operation intact. You can adjust the number further based on how the system feels to you, but keep in mind that a very low value can make the CPU feel less responsive in lightly threaded tasks.

This Windows method acts as a soft limit. It doesn't change the firmware's hard limit, but it tells the operating system to plan for a certain amount of CPU activity. For most gaming scenarios, that's enough to make a meaningful difference in power consumption. For more Windows optimization tips, read how to optimize Windows for gaming.

Setting a CPU power limit in the motherboard firmware

For a more direct control, you can adjust the power limit in the motherboard firmware, commonly called the BIOS or UEFI. During startup, you press a specific key, often Delete or F2, to enter the firmware interface. The exact key is shown on the boot screen.

Once inside, look for a section named something like CPU Configuration, Advanced, or Power Management. There, you'll find fields for the long-term power limit and the short-term power limit. These are the values that define how much power the CPU may sustain over a long period versus a short burst.

You can enter a lower number for both values. The motherboard will then instruct the processor to stay within that cap. This is the same kind of adjustment that a power-optimized processor might have from the factory, as noted in Intel's processor naming guide.

It's important to leave the limits at reasonable levels. If you set them too low, the CPU may not have enough power to run even basic tasks smoothly. A reduction of 10 to 20 percent from the default is a reasonable starting point, and you can adjust further based on how the system behaves.

Motherboards from different makers name these settings differently, so the exact labels may vary. The manual for your motherboard will list the correct terms and locations. Always follow the manufacturer's guidance when changing firmware settings. For a selection of compatible boards, see the best gaming motherboards guide.

What to consider before lowering the power limit

The effect of a lower CPU power limit on gaming depends on the balance between CPU and GPU demand in the games you play. At 1440p and 4K, the graphics card typically becomes the limiting factor, so the CPU is not required to run at full power. In that case, a moderate reduction can be a good fit. The best 1440p gaming PCs are designed with this balance in mind.

If you play at 1080p with a high refresh rate, the CPU often has more work to do because it needs to keep up with a fast graphics card. In that situation, you may want to keep the power limit close to the default or only reduce it slightly. The best 1080p gaming PCs guide can help you find a system that matches your needs.

For streaming, remember that using the GPU's built-in encoder shifts the encoding load away from the CPU. That means you can set a lower power limit without worrying about the extra work of software encoding, as the NVIDIA streaming page points out. The best gaming PCs for streaming guide includes systems that take advantage of this.

The key is to start with a small adjustment and observe how your experience changes. If the games you care about still feel responsive and load fast, you can keep the lower limit. If you notice any sluggishness in menus or light multitasking, you can raise it back a little. The goal is a power limit that matches the actual demands of your play, not one that forces the CPU to run at its maximum all the time.

What to pick for your play

Questions

Is setting a CPU power limit the same as undervolting?

No. Undervolting changes the voltage supplied to the processor, while a power limit caps the amount of power the CPU may draw. They can be used together, but they are separate adjustments.

Will a lower CPU power limit make my games unplayable?

In most gaming situations, especially at higher resolutions, the CPU is not the component doing the heaviest work. A moderate reduction in power limit will not stop games from running, though the exact impact depends on the balance between CPU and GPU load in each title.

Can I set the power limit from Windows without entering the BIOS?

Yes. The Windows power plan's advanced settings include a maximum processor state option that acts as a soft limit. It's an easy way to reduce CPU power draw without rebooting into the firmware.

What is the difference between the long-term and short-term power limit in BIOS?

The long-term limit is the average power the CPU is allowed to sustain over a period of time, while the short-term limit allows a higher spike for a brief burst. Both can be adjusted in the motherboard firmware.

Should I lower the power limit on a prebuilt gaming PC?

It depends on the components and your play. If the system already runs the games you care about and you want to reduce power draw, a small reduction is safe. Just start with a modest change and adjust based on your experience. See the best prebuilt gaming PC guide for systems that are easy to configure.