# XP/S5
**Wikidata**: [Q69956692](https://www.wikidata.org/wiki/Q69956692)  
**Source**: https://4ort.xyz/entity/xp-s5-q69956692

## Summary
XP/S5 is a supercomputer developed by Intel, running on the OSF/1 operating system. It achieved peak performance of 3.55 gigaflops and was part of the TOP500 list of supercomputers in 1994–1995, featuring 71 processor cores.

## Key Facts
- **Instance of**: Supercomputer
- **Manufacturer**: Intel (founded 1968-07-18, United States)
- **Operating System**: OSF/1 (Unix variant)
- **TOP500 System ID**: 1038
- **Peak Performance**: 3.55 gigaflops (Rpeak, 1995-06-01)
- **Maximum Performance**: 2.21 gigaflops (Rmax, 1995-06-01)
- **Processor Cores**: 71
- **First Deployed**: 1994-06-01
- **Related System**: Tru64 UNIX (developed 1992-01-01, United States)

## FAQs
### Q: What company built the XP/S5 supercomputer?
A: The XP/S5 was built by Intel, an American multinational technology company founded in 1968.

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

### Q: What was the peak performance of XP/S5?
A: XP/S5 achieved a peak performance of 3.55 gigaflops (Rpeak) in June 1995.

### Q: How many processor cores did XP/S5 have?
A: XP/S5 featured 71 processor cores.

### Q: When was XP/S5 first deployed?
A: XP/S5 was first deployed in June 1994.

## Why It Matters
The XP/S5 was a significant supercomputer in the late 1990s, contributing to the early development of high-performance computing. Its peak performance of 3.55 gigaflops and 71 processor cores positioned it as a notable system in the TOP500 rankings. Running on OSF/1, it leveraged Unix-based technology, which was influential in the era of Unix-dominated supercomputing. Intel’s involvement as the manufacturer underscored the company’s role in advancing both semiconductor technology and high-performance computing infrastructure. While not as powerful as later supercomputers, XP/S5 represented a key milestone in the evolution of computing systems during the transition from vector to parallel processing architectures.

## Notable For
- **TOP500 Ranking**: Achieved a peak performance of 3.55 gigaflops (Rpeak) in 1995.
- **Processor Architecture**: Featured 71 processor cores, a notable configuration for its time.
- **Operating System**: Ran on OSF/1, a Unix variant, reflecting the dominance of Unix in supercomputing.
- **Intel Manufacturing**: Built by Intel, one of the leading semiconductor companies of the era.
- **Historical Significance**: Part of the TOP500 list in 1994–1995, showcasing Intel’s contributions to high-performance computing.

## Body
### Overview
XP/S5 is a supercomputer manufactured by Intel and listed in the TOP500 with system ID 1038. It was operational in 1994–1995, achieving peak performance metrics of 3.55 gigaflops (Rpeak) and 2.21 gigaflops (Rmax) at different points in time.

### Technical Specifications
- **Processor Cores**: 71
- **Performance Metrics**:
  - **Rpeak**: 3.55 gigaflops (1994-06-01, 1994-11-01, 1995-06-01)
  - **Rmax**: 2.21 gigaflops (1994-06-01, 1994-11-01, 1995-06-01)
- **Operating System**: OSF/1 (Unix variant)

### Manufacturer and Industry Context
- **Manufacturer**: Intel, a United States-based company founded in 1968.
- **Industry**: Intel operates in the semiconductor and electrical industries.

### Related Systems
- **Tru64 UNIX**: A related operating system developed in 1992 by Digital Equipment Corporation (now part of HP).

### Historical Context
- **Deployment**: First deployed in June 1994.
- **Performance Evolution**: Performance metrics were recorded in June and November 1994, and June 1995, reflecting improvements over time.

### Significance
- **TOP500 Contribution**: XP/S5 was part of the TOP500 list, indicating its role in high-performance computing.
- **Technological Role**: Demonstrated Intel’s capabilities in manufacturing high-performance computing systems.