How Do I Know if a CPU Is Compatible With My GPU?

When you are going to upgrade your system, the GPU may be the first part to come to your mind. However, when you upgrade your GPU, you might ask yourself whether your CPU is compatible with your GPU. You can face this issue if you have an old CPU or buying a new one; in this article, I will tell you how to know if a CPU is compatible with the GPU.

How Do I Know if a CPU Is Compatible With My GPU?

In general, every GPU is compatible with every CPU available but if the CPU is not sufficient for the GPU, your system will be bottlenecked. The first sign that your CPU is not compatible is usage percentages; if the usage percentage of your GPU and CPU differ by a great margin, this makes them not proper pairs.

You can check if your CPU is compatible with your GPU before buying them through many tools; they will also help you build your PC from zero. The first tool is the PCPartPicker website; it allows you to build your PC from zero and calculate how much power and money you will need.

UserBenchmark website is the second tool on the list; it allows you to compare your performance and hardware spec. As a result, you will get a roadmap to upgrade your parts. The last tool is the Logical Increments website, which allows you to get the build suitable for your GPU or CPU, you can pick your CPU/GPU and your budget, and you will get the answer.

Many people believe that the GPU is the primary factor in PC performance, but this is not true. The GPU and the CPU act as a team; if you have a GPU that is much more powerful than your CPU, the GPU will not run at its maximum performance. Therefore, having a powerful CPU and a lower GPU will result in a bottleneck for your CPU.

Meanwhile, if you have a powerful GPU and a lower CPU, your GPU will not perform at its maximum performance. For example, If You have a GeForce GT 720MN as GPU and AMD Ryzen™ 7 5700G as a processor, your CPU will be bottlenecked as it’s much more powerful than your GPU.

What Are the Components Necessary for the Compatibility of GPU?

As mentioned earlier, every GPU will be compatible with every CPU; therefore, CPU compatibility will be not an issue. However, other PC parts’ compatibility is necessary to ensure that the GPU works properly and the PC will not boot.

These components are the PC case, power supply (PSU), motherboard, and monitor. Each component of the mentioned components can affect the performance of your system when paired with a noncompatible GPU; fortunately, in this article, you learn how to check the compatibility of each of them.

PC Case

When choosing a PC case, the first thing to check is if the GPU can fit into the case, you can do this by measuring your GPU length and looking for the maximum GPU length of the PC case. If the length of the GPU matches or is smaller than the maximum length of your case, the GPU will fit.

For example, the Gigabyte RTX 3080 Eagle length is 320mm, and the maximum GPU length of the Corsair 275r Airflow Case is 370mm, as a result, the GPU will be fitted perfectly. If you are willing to build a Mini ITX build, you will also need to check the GPU thickness.

Power Supply (PSU)

The more powerful your GPU is, the more power it will need; therefore, you will need to check if your GPU requires a 6-pin or an 8-pin, or both types and if your power supply can supply it. You will have to check the GPU’s spec sheet to know how much power or wattage your GPU requires.

The standard GPU requires from 100 to 300 watts; meanwhile, the High-end GPU needs around 600 watts. If your power supply can’t provide your GPU with the required wattage, your PC will not boot up, or you may face random shutdowns. You can use the Newegg website’s calculator to check how much power or wattage your system needs.


Most modern motherboards available in the market will have PCI express 3.0 slots; therefore, every GPU will be compatible and fit in the motherboard. If you got an old motherboard, it will not be a problem since it will contain a PCI express 2.0 slot. The GPU has a backward capability that enables it to work with PCI express 2.0 and 3.0 slots.

However, some types of motherboards are not compatible with most GPUs; these types are the ones that contain an AGP slot. Most GPUs will not be compatible with an AGP slot; therefore, if you have an AGP-slot motherboard, you will need to check which GPUs can suit your system.


After testing the compatibility of the parts of your system, the last thing is to check the monitor’s compatibility. The monitor’s compatibility depends on several factors, the connector types, resolution, and other extra options. Each factor can play a role in your monitor’s compatibility with your GPU.

Connector Types – some GPUs offer DVI, HDMI, or DisplayPort ports, but others don’t provide all of them. If you find that your GPU doesn’t have the same port as your monitor, you can purchase an adapter to switch your GPU port to your monitor port. The only downside of using an adapter is that you may sometimes face dropped frame rates or input lag. 

Resolution – If you got a powerful GPU that runs 4k resolution, you will need to check the maximum resolution your monitor can support. If your monitor doesn’t support 4k resolution, you will not be able to benefit efficiently from your GPU. Therefore, you must buy a new monitor if you want to run your games at 4k or render videos at 4k resolution.

Extra Options – some GPUs have additional features that can be compatible with your monitor, for example, Freesync/G-sync or a higher refresh rate. If you have a high-end monitor, you can sync your monitor with your GPU and avoid any tearing in gaming.

How to Check if your CPU/GPU is Bottlenecked?

Several signs can tell you that your PC is bottlenecked; for example, when your CPU is running at 99 – 100% of its capacity all the time, but your GPU is running at a lower range, you have a bottlenecked CPU. If the GPU is running at 99 – 100%, but the CPU is running at a lower range.

You will need to check the frame rate; if you find that the frame rate is steady, then there is no issue. If you find that you have a drop in your frame rate or are experiencing FPS drop spikes, your GPU is bottlenecked. 

How to Fix if your CPU/GPU is Bottlenecked?

If you have a bottlenecked CPU, you could lower the in-game settings related to the CPU performance, such as crowd density or physics fidelity. In addition, you can increase the settings of your GPU to 100%, which will decrease the load on your CPU but will not increase your frame rates.

Limiting the frame rates will help you have a steady gaming experience, especially if you have a bottlenecked CPU, as it will try to equal the usage of CPU and GPU. This will result in no FPS drop spikes or drop in your frame rates; meanwhile, if you have a GPU bottleneck, the solution is to lower the resolution or the graphics to decrease the load on the GPU. 


Every CPU is compatible with every GPU, but this doesn’t mean you should use any CPU with any GPU. If you have a powerful CPU and a lower GPU, you will have a bottlenecked CPU; meanwhile, if you have a powerful GPU and a lower CPU, your GPU will not perform at its maximum performance. 

To check if your CPU is compatible with your GPU, you can start by looking for the usage range of each part; if you find that the usage range differs by a significant margin, then your CPU doesn’t suit your GPU. Several tools can help you check if a CPU is compatible with a particular GPU, like PCPartPicker, UserBenchmark, and Logical Increments website.

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