# XP/S5
**Wikidata**: [Q69822892](https://www.wikidata.org/wiki/Q69822892)  
**Source**: https://4ort.xyz/entity/xp-s5-q69822892

## Summary
XP/S5 was a supercomputer manufactured by Intel, running on the OSF/1 operating system. It achieved peak performance of 3.3 gigaflops and was part of the TOP500 list of supercomputers, ranking at position 878.

## Key Facts
- **Instance of**: Supercomputer
- **Manufacturer**: Intel (founded 1968-07-18, United States)
- **Operating System**: OSF/1 (variant of Unix)
- **Performance**:
  - Rpeak: 3.3 gigaflops (1994-06-01, 1994-11-01, 1995-06-01)
  - Rmax: 2.06 gigaflops (1994-06-01, 1994-11-01, 1995-06-01)
- **Processor Cores**: 66
- **TOP500 System ID**: 878
- **Related OS**: Tru64 UNIX (developed 1992-01-01, United States)

## FAQs
### Q: What company manufactured XP/S5?
A: XP/S5 was manufactured 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 variant of the Unix operating system developed by the Open Software Foundation.

### Q: What was XP/S5's peak performance?
A: XP/S5 achieved a peak performance (Rpeak) of 3.3 gigaflops in 1994 and 1995.

### Q: How many processor cores did XP/S5 have?
A: XP/S5 had 66 processor cores.

### Q: Where did XP/S5 rank on the TOP500 list?
A: XP/S5 was listed at position 878 on the TOP500 supercomputer rankings.

## Why It Matters
XP/S5 was a significant supercomputer in the late 1990s, leveraging Intel's semiconductor technology to deliver high-performance computing capabilities. Running on OSF/1, it supported complex scientific and engineering applications. Its inclusion in the TOP500 list highlights its role in advancing computational power during a critical era in supercomputing. While not a record-breaker, XP/S5 contributed to the broader field of high-performance computing by demonstrating Intel's capabilities in large-scale systems.

## Notable For
- **TOP500 Ranking**: Achieved position 878, reflecting its status as a mid-tier supercomputer in the late 1990s.
- **Performance Metrics**: Delivered consistent Rpeak and Rmax performance of 3.3 and 2.06 gigaflops, respectively, across multiple benchmark dates.
- **Processor Architecture**: Featured 66 cores, showcasing Intel's early multi-core capabilities.
- **Operating System Compatibility**: Ran on OSF/1, a Unix variant, demonstrating cross-platform compatibility.
- **Historical Context**: Part of the broader evolution of supercomputing in the 1990s, competing with systems like Tru64 UNIX.

## Body
### Overview
XP/S5 was a supercomputer developed and manufactured by Intel, a leading American technology company. It was designed to run on OSF/1, a Unix-based operating system, and achieved notable performance metrics in the late 1990s.

### Performance and Specifications
XP/S5 had a peak performance (Rpeak) of 3.3 gigaflops and a maximum performance (Rmax) of 2.06 gigaflops, as recorded in 1994 and 1995. It featured 66 processor cores, reflecting Intel's early advancements in multi-core technology. These specifications positioned XP/S5 as a mid-tier supercomputer, capable of handling complex computational tasks.

### TOP500 Ranking
XP/S5 was listed at position 878 on the TOP500 supercomputer rankings, indicating its status as a respected but not top-tier system in the late 1990s. This ranking reflects its role in providing high-performance computing capabilities to scientific and engineering applications.

### Operating System and Compatibility
The supercomputer ran on OSF/1, a variant of the Unix operating system developed by the Open Software Foundation. This choice of OS ensured compatibility with a wide range of scientific and engineering software, enhancing its utility in research environments.

### Historical Context
XP/S5 operated during a period of significant advancements in supercomputing, competing with other systems like Tru64 UNIX. Its inclusion in the TOP500 list underscores its contribution to the field, even if it did not achieve record-breaking performance. The supercomputer's specifications and capabilities reflect Intel's role in shaping the evolution of high-performance computing in the late 20th century.