CPU and GPU Bottleneck Calculator
More settingsUpscaling, ray tracing and RAM speed
Before you use the bottleneck calculator, we recommend reading the guide below it.
Version history
v3.1 (Jun 20, 2026): Added processors: 7400, 7500X3D, 8400F, 9500F, 9600, 9950X3D, Core Ultra 5 225
v3 (Nov 11, 2025): Added a percentage figure alongside the descriptive result, to make the bottleneck easier to read.
v2.7 (Jul 24, 2025): Added graphics cards: RTX 5050 8GB, RTX 5060 8GB, RTX 5060 Ti 8GB, Arc B580, Arc A750, Arc B570, Arc A770, RX 9060 XT 16GB
v2.6.1 (Apr 16, 2025): Added the RTX 5060 Ti 16GB
v2.6 (Mar 7, 2025): Added the RTX 5070, RX 9070 and RX 9070 XT, plus 8K resolution
v2.5 (Mar 3, 2025): Added the RTX 5090 and RTX 5070 Ti; added search to the graphics card and processor menus
v2.4.1 (Feb 22, 2025): Added the RTX 5080
v2.4 (Jan 29, 2025): Added game type to the calculator
v2.3 (Jan 29, 2025): Added 28 new processors; added HD (720p) resolution; optimized the calculator’s formulas
v2.2 (Jan 24, 2025): Widened the balanced range; added the 9800X3D and 7600X3D; rewrote the calculator’s math
What is a bottleneck?
In a computer, when one part is noticeably weaker than the rest, we say there’s a bottleneck. So what does a bottleneck actually do to performance? The word explains itself. Picture pouring water out of a bottle: the narrower the neck, the slower the water comes out. If the water is the data your PC is processing, anything that holds that data back and slows it down is a bottleneck.
Why use the TweakFa bottleneck calculator?
With the calculator on this page you can pick different processors and graphics cards and see how much of a bottleneck each pairing has. The result is shown as a “GPU performance” percentage with an estimated FPS, and described as one of six levels, from “No bottleneck” to “Severe bottleneck”. How this percentage differs from other calculators’ percentages, and what “No bottleneck” really means, is explained further down this page.
Why are most bottleneck percentages misleading?
From what we’ve seen, the percentage-based calculators that have become the norm don’t present the information well. Whether their numbers are right or wrong, a bottleneck expressed as a percentage can be misleading: with a 10% bottleneck, people assume they can’t use 10% of their system’s capacity, when that isn’t what the 10% means at all.
That’s why the percentage in TweakFa’s calculator has one specific meaning: “GPU performance”, the share of your graphics card’s possible frame rate that your processor actually lets you get. For example, 80% means 20% of the card’s frames are lost to the processor. Alongside the percentage, the result is also given as one of six levels, each with a specific meaning:
No bottleneck and Minor bottleneck (95% and up, purple): the processor causes almost no bottleneck. But you also land here if you pair a very strong processor with a weak graphics card, which means most of the budget went into the processor and the balance between CPU and graphics card is off.
Balanced (85 to 95%, green): there’s an acceptable amount of bottleneck, but in return the processor and graphics card are well matched: instead of overspending on the CPU, the money went into a better graphics card.
Noticeable and Major bottleneck (60 to 85%, orange) and Severe bottleneck (below 60%, red): your processor can’t keep up with your graphics card, and the lower the percentage, the more you need a CPU upgrade.
Does “No bottleneck” mean zero bottleneck?
A zero bottleneck, meaning 100% efficiency and zero loss, is impossible under the laws of physics. You can’t build any machine, computer or otherwise, that loses no energy and runs at 100% efficiency. So when we design any system, computers included, the goal is to push efficiency as high as it goes and keep losses as low as possible. So when the calculator shows “No bottleneck”, it means your processor lets through 98% or more of your graphics card’s performance, not that the bottleneck is truly zero. There are also a few things about this calculator in particular that we explain below.
Why is the “balanced” range green? Is a balanced bottleneck better?
You may have noticed that Severe bottleneck is red, Noticeable and Major bottleneck are orange, Balanced is green and No bottleneck and Minor bottleneck are purple.
Why these colors? Severe and major bottlenecks are obvious: when your system has a big bottleneck, it runs into trouble, and red and orange say exactly that. Balanced and purple are a little more complicated. One way to reach the purple range is to pick a processor that’s much stronger than your graphics card. In that case, you get far fewer frames out of your system for the same money.
For example, a Core i9-14900K with an RTX 4060 at 1440p comes out at 100% and “No bottleneck” in all five games. But does it make sense to pair the 14900K, an extremely powerful processor, with a 4060 for gaming? Definitely not.
If you spend less on the processor, say a Core i5-12600K or i5-13400, and put the money you save toward an RTX 4070 Super instead of the 4060, most games still show “No bottleneck”, and only a CPU-heavy game like Baldur’s Gate 3 shows a noticeable or major bottleneck. But your frame rate roughly doubles: at 1440p Ultra, Cyberpunk 2077 goes from 49 to 98 FPS and Alan Wake 2 from 37 to 75 FPS.
That’s why we made the No bottleneck and Minor bottleneck range neither green nor red. Purple tells you the bottleneck there is almost negligible, but if you got there with a processor much stronger than your graphics card, the performance you give up by overspending on the processor hurts far more than the bottleneck itself.
How to use the TweakFa bottleneck calculator
The calculator has 5 main inputs that together set the bottleneck. The first two are your graphics card and processor. Next come resolution and graphics quality: raising either one puts more of the game’s workload on the graphics card, and the CPU bottleneck goes down.
The last input is the game. There are five, sorted from the most CPU-heavy (on the left) to the most GPU-heavy, and the order updates by itself as you change parts and settings. Some games lean more on the processor, others more on the graphics card. Under “More settings” you’ll also find upscaling (DLSS/FSR), ray tracing and RAM speed. Upscaling takes load off the graphics card and, like lowering the resolution, makes a CPU bottleneck show more. Ray tracing does the opposite and adds load on the card, and RAM speed affects the processor’s side.
How does the bottleneck calculator work for gaming?
To answer that, let’s follow the path data takes through your PC while you’re running a game. When you launch a game, data moves from your hard drive or SSD to RAM and the processor. The work happens in two phases: first on the CPU, then on the GPU. Once the CPU has done its part, the graphics card’s input is ready and the data moves on to it. The graphics card then does its own processing, and the result shows up on your monitor as frames.
A bottleneck happens when the processor is too slow to feed the graphics card, so the GPU has to wait for the CPU. How much that hurts gaming performance depends on how long the wait is. If it’s tiny, you’re in the balanced range, and the effect is a small drop in FPS.
Closing that small FPS gap would take a much more expensive processor. For the same money you could buy a stronger graphics card instead, which would raise your FPS much more.
But if the processor falls far behind and the graphics card spends a lot of time waiting, performance suffers and games lag and stutter. At that point your CPU is close to 100% usage and can’t keep up with everything the system throws at it: the game, the operating system and the rest.
What’s the best result in the bottleneck calculator?
From everything above, the balanced range offers the best trade-off between bottleneck and overall efficiency. To have no bottleneck in every game, even the most CPU-heavy ones, you have to pick a processor much stronger than your graphics card, which means overspending on the CPU, cooler and motherboard. Instead, you can put part of that money into a better graphics card and upgrade the processor only as far as you need.
In short, the green (Balanced) range is the best place for a CPU and GPU pairing. Ideally your result sits toward the top of that range, so you also get good performance in CPU-heavy workloads. To check that scenario, pick the games on the left of the slider, the most CPU-heavy ones, and see what bottleneck your system has there.