How to tell if CPU bottleneck is capping FPS - increase fps?

[Tyler33]

I've done all the usual things to increase fps, but I'm starting to think my CPU is the real bottleneck, not my GPU. The framerate dips happen in crowded areas or during complex physics, not just when the graphics are intense. How do you actually confirm a CPU bottleneck versus a GPU one before spending money on an upgrade?

[Scott22]

Short way to check is to watch the frame time chart and the cpu and gpu load while you play. If the cpu is at max and the gpu is not fully used your cpu is the bottleneck. If the gpu is at max and the cpu is idle then the gpu is the bottleneck. A lower resolution can confirm this.

[JohnXM]

Install a monitoring tool that shows real time cpu and gpu usage plus frame times. Run a test with a heavy cpu scene like many physics objects. If fps barely moves when you cap the frame but cpu stays max you are cpu bound. If fps climbs when you cap frame then gpu is the limiter.

[EleanorZB]

Upgrade path depends on the culprit. If cpu bound consider a faster cpu and faster ram plus a compatible motherboard. If gpu bound upgrade the video card or drop some cpu heavy settings. You can tune in game to reduce cpu load while keeping visuals decent.

[Ella_G]

Use resolution tests. Raise the render resolution to push the gpu. If fps improves you are gpu bound. If not the cpu is the limiter. Pair with a frame cap test to see steady frame rates and separate spikes from smooth performance.

[JosephNJ]

Keep drivers current and close background apps. If you want a quick path search for how to increase fps 2025 and run a structured test plan so you know what to upgrade before buying parts.