Prime95 and Cinebench are native programs. They run outside the browser, can load every core fully, and are paired with sensor tools that read temperature and clocks.
- SystemCheck runs in a browser tab with nothing to install and measures how a machine's performance holds over time, with an interval on each figure.
- A browser cannot read temperature, power or clocks, and adds overhead of its own, so its figures compare with other SystemCheck runs, not with a native tool's scores.
- Use the browser test for a quick, comparable check; use a native tool for a long stability soak or a sensor reading.
The short answer
Not as a replacement, and it is not trying to be one. A native stress test can push a machine harder and for longer, and a native tool can read the sensors. A browser test is quicker to run, needs nothing installed, and is enough to see whether a machine holds its speed under sustained load and to compare one run with another.
What the native tools do
Prime95 is a long-running native torture test used to check stability under heavy, sustained processor load. Cinebench renders a scene with the processor and gives a score. Both run outside the browser sandbox, can use every core directly, and are commonly paired with a monitoring tool that reads temperatures, clocks and power.
What SystemCheck does
SystemCheck runs CPU, GPU, memory and path tracing stages in a tab and records how the work completed changes over each stage. It reports a sustained level, the opening boost and the decay after it, with an interval on each headline figure and a stated measurement revision. It names conditions that make a run less trustworthy, such as battery power or a hidden tab, rather than hiding them.
What a page cannot do
A browser exposes no temperature, power, fan or clock reading, may cap the number of threads it reports, and adds sandbox overhead. So SystemCheck does not claim a stability verdict of the kind a long native soak gives, and its figures are not comparable with a native tool's scores.
Terms used here
Questions
- Can a browser stress test damage my PC?
- It runs ordinary computation inside the browser's limits, the same kind of load as heavy everyday work. Processors protect themselves by slowing down near their limits.
- Can I compare my SystemCheck score with a Cinebench score?
- No. They measure different work in different environments. Compare SystemCheck runs with other SystemCheck runs made under the same revision and conditions.