Project Zomboid · Bad session · 75 FPS · 399 stutters (3111 slow frames including 143 freezes) · @kleiN

Shared session

Project Zomboid

Oct 20, 2026, 11:05 PM · 3h 29min · 151 min gameplay

AMD Ryzen 7 9800X3D 8-Core Processor · MSI GeForce RTX 4080 Ventus 3X OC 16GB · 46 GB RAM · 2560x1440 · driver 617.14Exclusive fullscreen

Detected by: system event · End: the game closed

Key takeaways

Bad session

Stutters cost a noticeable share of the playtime.

399 stutters (3111 slow frames including 143 freezes) · 197.9 s lost

Main cause: Game computation. The worst stretch cost 14.8 s of lost frames.

Pace set by the processor

The processor set the pace on 77% of the frames: it decides how many frames per second you get, not the graphics card.

Performance

FPS, lows and stutter breakdown

Frame timing

151 min active / 209 min total

Average FPS

Session average

1% low

Average of the worst 1% of frames

0.1% low

Average of the worst 0.1% of frames

Frame p99

32.5 ms

Time per frame, in the slowest 1%

Median frame time of each slice (ms) over the session. Red dots = slowest frame of a slice, when it clearly breaks from the session’s pace.

Slow frames (3111)

197.9 s lost

Game computation344(29.4 s)

Not enough RAM155(16.2 s)

Drive loading1(0.1 s)

Breakdown of the first 500 stutters.

System state

CPU, GPU, VRAM averages and temperatures

Game CPU

25%

GPU

43%

CPU temp max

81°

67° on average

GPU temp max

67°

55° on average

Processor · Graphics card over the session, peak of each slice. The dashed lines are the thresholds of the thermal summary.

Advanced sensors (PawnIO driver)

VRM max 53 °CCPU fan max 4,240 RPMGPU fan max 1,517 RPMCPU power avg. 101 WGPU power avg. 137 W

Measurement conditions

V-Sync: off
Loading hitches excluded: 47
Measurement cost: 0.5% of the processor

Pace set by the processor

The processor set the pace on 77% of the frames: it decides how many frames per second you get, not the graphics card.

VRAM peak

14.2 GB

Input lag p99

77.1 ms