Bottleneck Calculator for CPU and Graphics Card

A bottleneck occurs when one component holds back another. In gaming, this usually involves the CPU and graphics card: if the CPU is too slow, it cannot prepare enough frames and the graphics card has to wait. If the graphics card is too slow, it runs at its limit while the CPU still has capacity to spare. The bottleneck calculator shows what percentage of the faster component's performance goes unused. This type of tool is also called a “Bottleneck Calculator.”

Choose your CPU, graphics card and resolution. Each component has a performance score from 0 to 100 for typical games: 100 represents the Ryzen 7 9800X3D for CPUs and the GeForce RTX 5090 for graphics cards. The resolution determines how much graphics performance a CPU can utilize, and the difference between the two scores gives the bottleneck percentage. The calculation runs in your browser, with no sign-up or upload. Only your selections appear in the address bar so you can share them as a link.

Below 10%, a pair is considered balanced, so 5% is perfectly fine. From 10% to 20%, the bottleneck is mild and barely noticeable in everyday use. From 20% to 35%, it is noticeable and may cause stuttering and fluctuating frame rates. At 35% or above, it is severe and an upgrade is worth considering. These categories are guidelines, not an official standard; no pair is perfectly matched.

No. When gaming, a fully utilized graphics card is normal and desirable: it means you are getting the most out of it. A CPU limit is more concerning because graphics card performance you paid for goes unused. If the graphics card is the clear limit, the calculator shows how much capacity your CPU has left and suggests faster graphics cards that can make better use of it.

At higher resolutions, the graphics card has to render many more pixels, while the CPU does little extra work. In the calculator, a CPU with a score of 100 can fully utilize a graphics card with a score of 45 at 1080p, 65 at 1440p and 100 at 4K. The same pair can therefore show a severe bottleneck at 1080p and none at 4K.

Choose your graphics card and the resolution you play at, then try different CPUs. If the bottleneck is below 10%, the pair is a good match. If the CPU is holding the graphics card back, the upgrade suggestion lists up to 3 faster models released in 2022 or later.

The calculator estimates the bottleneck from your components; it does not measure anything on your PC. To check in-game, use an overlay that shows CPU and graphics card utilization. If graphics card utilization stays well below 100% while the frame rate stops rising, the CPU is usually holding it back. If the graphics card runs near 100%, it is the limiting component.

You can try increasing the resolution or render scale for free: this puts more load on the graphics card but hardly any on the CPU. Also lower CPU-intensive settings such as view distance, object density and shadows, and check your cooling and background programs. If that is not enough, upgrade your CPU. The calculator's upgrade suggestion lists suitable models. First, check your motherboard socket, RAM type and power supply.

This is an estimate based on performance scores for typical games, not a benchmark for a specific title. Drivers, graphics settings and cooling affect actual results, and RAM is not included in the calculation: 8 GB or a single RAM stick without dual-channel can slow a game down further. The catalog contains desktop models only. For a laptop, choose the desktop model closest to your laptop's chip and expect slightly worse results.