# XP/S5
**Wikidata**: [Q69671640](https://www.wikidata.org/wiki/Q69671640)  
**Source**: https://4ort.xyz/entity/xp-s5-q69671640

## Summary
XP/S5 is a supercomputer manufactured by Intel, designed to run the OSF/1 operating system. Active in the mid-1990s, it achieved performance benchmarks of up to 3.3 gigaflops (Rpeak) and was recognized in the TOP500 list of high-performance computing systems. It utilized 66 processor cores and contributed to advancements in computational power during its operational period.

## Key Facts
- **Manufacturer**: Intel, a U.S.-based semiconductor company founded in 1968.
- **Operating System**: OSF/1, a Unix variant developed by the Open Software Foundation.
- **Processor Cores**: 66 cores.
- **Performance (1995)**: 2.06 Gflops (Rmax) and 3.3 Gflops (Rpeak).
- **TOP500 Recognition**: Listed with system ID 423, active between 1993 and 1995.
- **Related Technology**: Tru64 UNIX, a contemporary operating system developed in 1992.

## FAQs
### Q: Who manufactured the XP/S5 supercomputer?
A: The XP/S5 was manufactured by Intel, a leading semiconductor and technology company.

### Q: What operating system did XP/S5 use?
A: XP/S5 ran on OSF/1, a Unix-based operating system developed by the Open Software Foundation.

### Q: How powerful was the XP/S5 in terms of performance?
A: The system achieved a peak performance (Rpeak) of 3.3 gigaflops and a sustained performance (Rmax) of 2.06 gigaflops, measured in 1995.

## Why It Matters
XP/S5 represents a notable milestone in the evolution of high-performance computing during the 1990s. As a supercomputer powered by Intel technology and the OSF/1 operating system, it exemplified the integration of advanced hardware and software to tackle complex computational challenges. Its inclusion in the TOP500 list underscored its significance in scientific and industrial applications, contributing to fields such as research, engineering, and data analysis. The system’s performance metrics, though modest by modern standards, highlighted the rapid progress in processing power during this period, setting foundational benchmarks for future supercomputer designs.

## Notable For
- **66-Processor-Core Architecture**: Utilized 66 cores to achieve high-performance computing capabilities.
- **Consistent TOP500 Presence**: Maintained a position in the TOP500 list across multiple rankings from 1993 to 1995.
- **Rmax/Rpeak Metrics**: Demonstrated sustained (2.06 Gflops) and peak (3.3 Gflops) performance, reflecting efficient computational output for its era.
- **Unix-Based Innovation**: Leveraged the OSF/1 operating system, showcasing the adaptability of Unix variants in supercomputing environments.

## Body
### Technical Specifications
- **Manufacturer**: Intel, headquartered in Santa Clara, California.
- **Processor Cores**: Equipped with 66 processor cores.
- **Operating System**: Primarily operated on OSF/1, a Unix derivative.

### Performance Benchmarks
- **1993–1995**: Demonstrated consistent Rmax (2.06 Gflops) and Rpeak (3.3 Gflops) across evaluations in June and November of each year.
- **Measurement Standards**: Performance metrics adhered to Rmax (sustained) and Rpeak (theoretical) standards, common in high-performance computing assessments.

### Operational Context
- **TOP500 Inclusion**: Recognized in the TOP500 list (system ID 423), a bi-annual ranking of the world’s fastest supercomputers.
- **Technological Era**: Represented Intel’s contributions to supercomputing during the 1990s, a period marked by rapid advancements in processor architecture and parallel computing.