Frametide Guides
MenuCPU or GPU bottleneck? How to tell in two minutes

Guides/Hardware

CPU or GPU bottleneck? How to tell in two minutes

By Michael Steininger · Updated October 2026

Bottleneck calculators guess from a table. Your game gives you the real answer, and it can differ from game to game and even from scene to scene.

Quick answerPlay without a frame limit and watch GPU usage. Around 95 to 99 percent: the graphics card is the limit. Clearly lower: the processor (or the game engine) is.

Test 1: GPU usage#

  1. Turn off every frame limit and V-Sync for the test, so nothing caps the frame rate.
  2. Show GPU usage while you play: the overlay in the NVIDIA app, AMD Adrenalin's metrics overlay, or a tool like MSI Afterburner. Task Manager's GPU graph works too, on a second screen.
  3. Play a normal, busy scene for a minute.
  • GPU usage around 95–99%: the graphics card is working flat out. It's the limit.
  • GPU usage clearly lower, say 60–80%, while the FPS isn't capped: the graphics card is waiting for the processor. The CPU (or the game's engine) is the limit.
WarningOverall CPU usage is misleading. A game can be limited by one or two busy cores while the total shows 40%. GPU usage is the better signal.

Test 2: lower the resolution#

Drop the resolution (or the render scale) a lot and look at the FPS. If it barely changes, the processor is the limit. If it jumps up, the graphics card was.

What to do with the answer#

  • GPU-bound: lower graphics settings that cost the card (resolution, shadows, ray tracing) or use upscaling like DLSS or FSR. Raising settings that cost little on the CPU is free here.
  • CPU-bound: check the things that feed the processor before blaming it: RAM speed (XMP/EXPO), dual channel, background apps, temperatures. Settings like view distance and crowd density cost the CPU.

Questions#

Is a bottleneck bad?
No. Something is always the limit, otherwise the FPS would be endless. It only matters which part limits you and whether that limit is below what you want.
Are bottleneck calculators accurate?
No. They can't know your game, settings, resolution or whether your memory runs at its rated speed. Your GPU usage in your own game is the real answer.
Will a new graphics card help?
Only if the GPU is the limit in the games you play. If GPU usage is low with uncapped FPS, a faster card will mostly sit idle.
Check it automatically

Frametide measures FPS, 1% lows and stutters in your own game (Premium) and checks the setup problems that hold a processor back, like memory speed and single-channel RAM (free scan: how many it found).

Download free →