- Super PI
Super PI is a
computer program that calculatespi to a specified number of digits after the decimal point - up to a maximum of 32 million. It usesGauss-Legendre algorithm and is a Windows port of the program used byYasumasa Kanada in1995 to compute Pi to 232 digits.ignificance
Super Pi is used by many overclockers to test the performance and stability of their computers. In the overclocking community, the standard program provides a benchmark for enthusiasts to compare "world record" pi calculation times and demonstrate their overclocking abilities. The program can also be used to test the stability of a certain overclock speed. If a computer is able to calculate PI to the 32 millionth place after the decimal without mistake, it is considered to be moderately stable in terms of RAM and CPU. However, longer tests with other CPU/RAM intensive calculation programs will run for hours instead of minutes and may better stress system stability. While Super Pi is not the fastest program for calculating Pi (see
software for calculating π for faster alternatives), it remains very popular in the hardware and overclocking communities.Credibility concerns
The competitive nature of achieving the best Super Pi calculation times led to fraudulent SuperPI results, reporting calculation times faster than normal. Attempts to counter the fraudulent results resulted in a modified version of Super Pi, with a
checksum to validate the results. [ [http://www.xtremesystems.com/pi/ Super PI Mod ] ] However, other methods exist of producing inaccurate or fake time results, raising questions about the program's future as an overclocking benchmark.The Future
Super PI was single threaded, so its relevance as a measure of performance in the current era of
multi-core processors was diminishing quickly. As the calculation times became faster and faster, Super PI was also becoming a rather poor stability test due to the fact that a stability test needs to run long enough to properly stress test the hardware. Many users were moving to Orthos orOCCT for their stability testing since those are multithreaded programs.References
External links
ftp://pi.super-computing.org/windows/super_pi.zip
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