Diagnose
Sixty frames, then forty. The counter says what. The curve says why.
A frame rate that fades over a session is a limit being reached. The test loads the CPU and the GPU in turn and shows which one gave up, and how.
What the report tells you
Three figures, each with its reading.
CPU decay
%
The processor's loss over the run. A game's frame rate follows the CPU's sustained level more closely than its boost.
Frame time
ms
Average frame time under a fixed-resolution raster load, with pacing. Stutter shows as variance here before it shows on screen.
GPU decay
%
The graphics card's own loss over its stage. On a deep run three loops give a worst-over-best stability figure.
The diagnosis
The shape of the curve, read for your case.
01CPU slides, GPU holds
Consistent with a cooling-limited processor and a card waiting on it; a sensor tool confirms it. Airflow and a fan curve, or a lower CPU-bound setting.
02CPU holds, GPU decays
Consistent with the card running hot; a sensor tool confirms it. Its own fan curve, or the case's exhaust.
03Both erratic
Consistent with something else on the machine. An overlay, a recorder, a sync client. Contention looks like noise, not a shape.
Every class comes with a stated confidence and the measurement’s own noise floor. How the shape is read
Where a browser stops
What it cannot tell you.
- No frame rate for your game: the GPU stage is a fixed scene at a fixed resolution, comparable across runs and machines, not against a specific title.
- No temperature for either chip: the shape is the evidence.
- No exact card model: the browser reports a renderer string and hides the rest on purpose.
Which run
Deep, 9 minutes.
A session is long. The deep run holds the CPU for three minutes and loops the GPU pass three times, which is what it takes to see a card sag.
All three kinds are free. The choice is on the set-up screen.
Questions
Asked in these words.
- Why does my FPS drop after 10 minutes?
- One of the two chips reached a limit and stepped down. The test runs each under sustained load and shows which lost performance and how: a slide is consistent with heat, a step with a power limit, noise with another program. The fix depends on which chip and which shape.
- Is it my CPU or my GPU?
- The report gives both a decay figure. The one that fell is the one to look at; if the CPU held and the GPU decayed, the card's cooling is the place to start, and the other way round.
- Can I fix FPS drops without new hardware?
- Often. A sliding curve responds to cleaning, paste and airflow. A stepped curve responds to a power limit or a performance mode. An erratic curve responds to closing whatever else is running. The before/after comparison shows whether the change worked.