Why the Same GPU Gets Different FPS
A GPU model is only one part of a gaming system, so identical GPU names do not guarantee identical results.
CPU differences
A faster or slower CPU can change performance, especially in CPU-limited games or at high frame-rate targets.
RAM configuration
Capacity, memory speed and channel configuration can change system behaviour. Integrated graphics can be particularly sensitive because they share system memory.
Power and thermals
GPU and CPU power limits, cooling and sustained temperatures can affect clocks and therefore performance.
Software and game versions
Drivers, patches and graphics settings can change benchmark results. A result from one version should not automatically be treated as a guarantee for another.
Why RigMetric labels references
When a benchmark does not exactly match the selected CPU or configuration, it is more honest to identify it as a reference instead of presenting it as an exact measurement.