Does SystemCheck work on a phone?

No. SystemCheck requires a desktop or laptop browser with WebGL2 and does not support mobile in v1. Geekbench has Android and iOS applications and is the right tool for a phone or tablet.

Why does SystemCheck report decay when Geekbench does not?

They are answering different questions. Geekbench's workloads are short by design, which makes them a clean measure of peak capability. SystemCheck holds a multi-core load for 60 seconds specifically to see how much of that peak survives, which is a different and narrower thing to measure.

Are SystemCheck and Geekbench scores comparable?

No. They use different workloads on different scales, and SystemCheck runs through a browser while Geekbench runs natively. Neither score converts into the other.

Which one should I trust for a purchase decision?

Geekbench, generally. Its database is large enough to place almost any device, and its native measurement is more precise. SystemCheck is more useful after the purchase, for checking that the machine in front of you behaves the way its class should under load.

Compare/Cross-platform native benchmark

13 dimensions · 5 where Geekbench is stronger

SystemCheck vs Geekbench

SystemCheck: a no-install read on what a PC holds under sustained load, and why it fell. Geekbench: comparing across platforms, a Mac against a Windows laptop against a phone, with a very large results database behind the number.

5 to us · 5 to Geekbench · 3 even

SystemCheck

Browser stress test · free, no install

Run the test

Geekbench

Cross-platform native benchmark

Dimension by dimension

Names why performance fell

Yes: the CPU curve is classified (a single step, a steady slide, a sawtooth) and the report names the likely cause with its confidence statedSystemCheck

No: a peak score by design; a cause is out of scope

Install required

No: opens in a browser tabSystemCheck

Yes: a native application per platform

Platforms

Desktop and laptop browsers with WebGL2. No mobile in v1

Windows, macOS, Linux, Android and iOSGeekbench

Mobile support

Not supported in v1

Yes: Android and iOS applicationsGeekbench

Price

Free to run; detailed report is a one-time paid unlock

Free version available; a paid licence unlocks additional modesEven

Comparison database size

New product, small result history

Very large public result browser spanning years and a wide device rangeGeekbench

Measures sustained decay

Yes: decay across a 60-second sustained multi-core load is a primary output, and the curve's shape is classified to name the likely causeSystemCheck

Workloads are short by design; the suite measures peak capability rather than endurance

Reports run-to-run consistency

Yes: run-to-run and within-run consistency are reportedSystemCheck

Reports a score per run

Reads hardware sensors

No: the web platform exposes no temperature, power, fan or VRAM API

A native app has system-level access a browser does not, though thermal telemetry is not its headline outputGeekbench

Measurement precision

Directional: results move with browser, driver and background load

Runs natively with no browser translation layerGeekbench

Test duration

Three minutes across four stages, or eight across seven on the deep run

A few minutes for a full CPU runEven

Time to first result

Immediate: no download or setup stepSystemCheck

Requires downloading and installing the application

Best suited for

Seeing how a machine holds up once load is sustained

Comparing peak capability across devices and platformsEven

What each tool is

SystemCheck is a browser-based stress test. It runs four stages (a 60-second sustained multi-core CPU load, a memory bandwidth and latency stage, a GPU raster load and a path-tracing load) in three minutes, with no install and no account for the core test. It reports throughput alongside decay and consistency over sustained load, rather than a single peak number, and it classifies the shape of the CPU curve to name why performance fell. It cannot read temperatures, power draw, fan speed or VRAM size, because the web platform exposes no API for any of them, and its results are directional rather than lab-grade.

Geekbench, from Primate Labs, measures single-core and multi-core CPU performance along with GPU compute, using a set of short workloads modelled on common real-world tasks. Its defining feature is reach: it runs on Windows, macOS, Linux, Android and iOS, which makes it one of the very few benchmarks that can put a phone and a workstation on the same scale.

Results are published to the Geekbench Browser, a large public database that has accumulated years of submissions across an enormous range of devices. This is one of the most complete cross-device comparison sets available anywhere, and it is free to search.

Geekbench's workloads are short by design. The suite is a measure of peak capability rather than endurance, and this is a documented characteristic rather than a flaw. SystemCheck is built around the opposite question: what happens once the load stops being brief.

Where Geekbench is stronger

These are the dimensions where Geekbench beats SystemCheck outright. Some are structural: a browser cannot reach hardware sensors at all.

Geekbench runs on Android and iOS as well as desktop operating systems. SystemCheck does not support mobile at all in v1.
Its public result browser is an unusually deep cross-device database. Comparing a laptop against a phone against a server is something SystemCheck cannot offer.
It runs natively rather than through a browser, so its scores are more precise and less sensitive to browser version or background tabs.
Its workloads are modelled on real everyday tasks, which makes the score easier to relate to ordinary use than a synthetic parallel load.

Where SystemCheck is stronger

It names why. Geekbench measures peak by design; SystemCheck measures what is held, reads the shape of the loss and names the likely cause.
No install on any platform. It opens in a browser tab.
Decay under sustained load is a primary output, where Geekbench's short workloads are explicitly a peak measure.
Consistency is reported rather than inferred from repeated manual runs.
Includes GPU raster and path-tracing stages alongside the CPU stage in a single session.

Which should you use?

Use Geekbench if…

Geekbench: comparing across platforms, a Mac against a Windows laptop against a phone, with a very large results database behind the number.

Use SystemCheck if…

Use SystemCheck when the question is endurance rather than peak: whether a thin laptop holds its multi-core throughput past the first half minute, or whether a rebuilt desktop still decays the way it did before. Also use it when you cannot install software on the machine in front of you. It is also the one to reach for when the question is why a machine got slower: the report names the shape of the loss and puts the retest next to the run it is trying to beat.

Questions

Does SystemCheck work on a phone?: No. SystemCheck requires a desktop or laptop browser with WebGL2 and does not support mobile in v1. Geekbench has Android and iOS applications and is the right tool for a phone or tablet.
Why does SystemCheck report decay when Geekbench does not?: They are answering different questions. Geekbench's workloads are short by design, which makes them a clean measure of peak capability. SystemCheck holds a multi-core load for 60 seconds specifically to see how much of that peak survives, which is a different and narrower thing to measure.
Are SystemCheck and Geekbench scores comparable?: No. They use different workloads on different scales, and SystemCheck runs through a browser while Geekbench runs natively. Neither score converts into the other.
Which one should I trust for a purchase decision?: Geekbench, generally. Its database is large enough to place almost any device, and its native measurement is more precise. SystemCheck is more useful after the purchase, for checking that the machine in front of you behaves the way its class should under load.

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