What is a CPU or GPU bottleneck?

A bottleneck means one part finishes its work and waits on the other. If the CPU is slower at preparing frames, the GPU sits under-used. If the GPU cannot draw frames fast enough, a strong CPU will not raise average FPS much.

How accurate is this bottleneck calculator?

It is a relative estimate using performance indices and resolution weights — useful for spotting obvious mismatches before you buy. It is not a substitute for in-game benchmarks, frametime overlays, or reviews for your exact titles.

Why does resolution change the result?

At 1080p the GPU often finishes quickly, so CPU limits show up more. At 4K the GPU does far more work, so many CPU-limited pairs look more balanced or GPU-bound instead.

Should I always upgrade the bottlenecked part?

Not always. Sometimes changing resolution, settings, or enabling DLSS/FSR shifts the load enough. Upgrade when the weaker side blocks the FPS or image quality you actually want.

Does this tool upload my PC specs?

No. You pick parts in the browser; scoring runs client-side. There is no account required to use the calculator.

What should I check besides CPU and GPU?

RAM speed/configuration, storage, thermals, power limits, drivers, and background apps all affect real FPS. A “balanced” pair can still feel bad if the GPU is overheating or RAM is running in a slow mode.

PC gaming utility

Free CPU–GPU bottleneck calculator

FrameBalance estimates whether your processor or graphics card is the weaker link at 1080p, 1440p, or 4K — then suggests practical next steps before you spend on upgrades.

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Live calculator

Check CPU–GPU balance

Estimates only — real FPS depends on game engine, settings, RAM, and drivers.

Processor (CPU)

Relative score 98 · mid · 2023

Graphics card (GPU)

Relative score 118 · high · 2023

Target resolution

CPU bottleneck (~17%)

Imbalance17%

Adjusted CPU: 98
Adjusted GPU: 118

At 1440p, the Ryzen 5 7600 is the weaker link versus the GeForce RTX 4070. Expect a mild CPU-side limit in CPU-heavy titles, esports, and 1% lows.

Raising resolution or graphics settings often shifts load onto the GPU and can hide a CPU limit.
Prefer a stronger gaming CPU (or an X3D chip) before upgrading an already-fast GPU further.
Close background apps, use a fast dual-channel RAM kit, and verify power limits are not throttling the CPU.

How to use this bottleneck calculator

Pick the CPU and GPU closest to your build (or the parts you plan to buy), choose the resolution you actually play at, and read the imbalance estimate. A mild percentage in one game genre can disappear in another — treat the result as a directional guide.

If the tool reports a CPU bottleneck, try higher settings or resolution before panic-buying silicon; that often moves work onto the GPU. If it reports a GPU bottleneck, lowering presets or enabling upscaling usually raises FPS more than a CPU swap.

Want a deeper walkthrough of a specific combo? Use the pairing guides — each page has unique advice for that CPU + GPU, not a duplicated template.

Resolution-aware scoring

1080p weights the CPU more heavily. 4K shifts emphasis to the GPU. The same parts can look mismatched at one resolution and fine at another.

Private by default

No account, no driver install, no hardware scan upload. Selections stay in your browser session while you compare builds.

Built for upgrade decisions

Results include plain-language tips: when to raise settings, when to buy CPU, and when the GPU is the real ceiling.

Popular CPU + GPU bottleneck checks

Start from a common pairing, then tweak parts in the calculator.

View all pairing guides →

CPU vs GPU bottleneck — quick signs

CPU-side clues: GPU usage stays well below max while FPS disappoints; raising graphics barely changes frames; 1% lows feel rough in CPU-heavy games.

GPU-side clues: GPU usage hugs 95–99%; lowering resolution or presets jumps FPS; a stronger CPU barely moves averages.

More detail in our guides on CPU vs GPU bottlenecks and why 1080p is often CPU-limited.

Frequently asked questions

What is a CPU or GPU bottleneck?: A bottleneck means one part finishes its work and waits on the other. If the CPU is slower at preparing frames, the GPU sits under-used. If the GPU cannot draw frames fast enough, a strong CPU will not raise average FPS much.
How accurate is this bottleneck calculator?: It is a relative estimate using performance indices and resolution weights — useful for spotting obvious mismatches before you buy. It is not a substitute for in-game benchmarks, frametime overlays, or reviews for your exact titles.
Why does resolution change the result?: At 1080p the GPU often finishes quickly, so CPU limits show up more. At 4K the GPU does far more work, so many CPU-limited pairs look more balanced or GPU-bound instead.
Should I always upgrade the bottlenecked part?: Not always. Sometimes changing resolution, settings, or enabling DLSS/FSR shifts the load enough. Upgrade when the weaker side blocks the FPS or image quality you actually want.
Does this tool upload my PC specs?: No. You pick parts in the browser; scoring runs client-side. There is no account required to use the calculator.
What should I check besides CPU and GPU?: RAM speed/configuration, storage, thermals, power limits, drivers, and background apps all affect real FPS. A “balanced” pair can still feel bad if the GPU is overheating or RAM is running in a slow mode.