System stability tester

Brand new

Run CPU, memory, and GPU stress tests to reproduce system instability

A first-pass stability and reproducer tool. It runs configurable workloads to help determine if the machine crashes, reloads, freezes, or behaves abnormally under heavy stress.

This tool cannot diagnose exact bad hardware, read WHEA logs, check temperatures, or identify a specific failing component (like a specific CPU core). Keep your device plugged in and this tab visible during testing.

Note: Chromium-based browsers (Chrome, Edge, Brave) generally allow higher maximum memory allocations and more consistent GPU stress than Firefox or Safari.

Wake lock off

Run time:

4:00

CPU burst

Short, intense bursts of CPU activity across all cores

CPU

CPU sustained

Continuous, heavy load on all CPU cores to test thermal limits

CPU

Single-core max boost

Pushes a single core to its maximum boost frequency

CPU

L2/L3 cache pulse

Rapid memory access patterns to stress the L2 and L3 caches

CPU

Dev workload

Simulates a typical developer workload with spikes and mixed usage

CPU

Memory pressure

Allocates and heavily accesses memory to detect faults

Memory

GPU stress

Intense WebGL rendering to stress the GPU

GPU

Combined system stress

Simultaneous CPU, memory, and GPU stress for maximum power draw

CPUMemoryGPU