The product key was a license and a challenge. Superposition's license agreement—when read—was not the usual tangle of legalese. Instead it contained a single sentence in a small, italic font: "Each activation chooses a strand; each strand alters the likelihood of neighboring strands." No one was sure whether that referred to the program's internal probabilistic model or to reality itself.

: Cracking the software can make the benchmark crash. How to Get a Better Benchmark Experience for Free

If your primary goal is to test GPU stability and thermal cooling, FurMark is the industry standard. It is completely free and specifically designed to push graphics cards to their absolute thermal limits.

Several academic papers have compared stress-ng (the engine behind Superposition) against other tools to determine which provides a more accurate measure of system stability.

: A completely free, industry-standard tool for testing thermal stability and GPU limits.