PC Bottleneck Calculator
Select your CPU, GPU, and RAM. Get an instant bottleneck score, performance gauge, FPS estimates across 16 games, and balanced upgrade suggestions — free, no sign-up.
What is a PC bottleneck and how does it affect gaming?
A bottleneck happens when one component is significantly slower than another, causing the faster part to sit idle. The most common pairing is CPU vs GPU — an imbalance directly impacts your FPS and gaming performance.
CPU bottleneck
Your processor cannot keep up with your GPU. Common in CPU-heavy games and at high framerates (144fps+).
GPU bottleneck
Your graphics card is the slower part. This is actually ideal — it means the GPU runs at 100% load.
RAM impact
RAM speed and capacity affect CPU headroom. Enabling XMP/EXPO in BIOS is a free upgrade that helps reduce CPU bottlenecks.
How does resolution affect bottlenecks?
At 4K the GPU does almost all the work. At 1080p/240fps the CPU is under far more pressure. The same build can be GPU-bottlenecked at 4K but CPU-bottlenecked at 1080p high framerate.
How to use this tool
Select your CPU and GPU
Choose your exact processor and graphics card from the dropdowns. They are grouped by generation for easy browsing.
Select your RAM
Choose your RAM kit. Higher speed DDR5 or enabling XMP/EXPO can meaningfully reduce CPU bottlenecks, especially at 1080p.
Set target framerate and use case
Select your target FPS and what you mainly use your PC for. Gaming at 240fps is far more CPU-heavy than gaming at 60fps.
Read your results
Under 15% is good. 15–35% is minor. 35–60% is moderate. Above 60% is severe and upgrading the bottlenecking component will have major impact.