# J1

> supercomputer

**Wikidata**: [Q74588602](https://www.wikidata.org/wiki/Q74588602)  
**Source**: https://4ort.xyz/entity/j1

## Summary
J1 is a supercomputer developed by Lenovo and located in China. It was ranked 500th on the TOP500 list as of November 2023 and achieved a peak performance of 3.84 petaflops.

## Key Facts
- J1 is a supercomputer manufactured by Lenovo, located in China
- It uses Intel Xeon Gold 6133 processors (20 cores, 2.5GHz) with a total of 48,000 processor cores
- The system runs on Linux and achieved a maximum performance of 4.8 quadrillion floating-point operations per second (4.8 petaflops)
- J1's measured LINPACK performance (Rmax) is 2.01 petaflops
- The supercomputer was first listed on the TOP500 in June 2019 at rank 120
- It has declined in ranking over time, from 120th in 2019 to 500th in 2023
- J1's TOP500 system ID is 179650
- The system uses 25G Ethernet networking
- It was manufactured by Lenovo, a Chinese multinational technology company founded in 1984

## FAQs
### Q: What type of processor does J1 use?
A: J1 uses Intel Xeon Gold 6133 processors, which have 20 cores each running at 2.5GHz.

### Q: Where is J1 located?
A: J1 is located in China, though the specific facility is not detailed in the available information.

### Q: What operating system runs on J1?
A: J1 runs on Linux, the family of Unix-like operating systems created by Linus Torvalds in 1991.

## Why It Matters
J1 represents China's continued investment in high-performance computing infrastructure, though its declining TOP500 ranking from 120th in 2019 to 500th in 2023 suggests it has been surpassed by newer, more powerful systems. As a Lenovo-manufactured system, J1 demonstrates the company's capabilities in building competitive supercomputing solutions. The system's specifications, including its use of Intel Xeon Gold processors and Linux operating system, reflect standard industry practices for high-performance computing installations. While no longer among the world's fastest supercomputers, J1 still provides significant computational resources for research and industrial applications requiring petascale processing power.

## Notable For
- Being manufactured by Lenovo, one of the few Chinese companies producing supercomputers
- Maintaining TOP500 presence for over four years (2019-2023)
- Using Intel Xeon Gold processors in a large-scale deployment
- Achieving 2.01 petaflops of measured LINPACK performance
- Representing a significant investment in computational infrastructure by its Chinese operators

## Body
### Technical Specifications
J1 is built around Intel Xeon Gold 6133 processors, with each processor containing 20 cores operating at 2.5GHz. The system incorporates a total of 48,000 processor cores, making it a substantial high-performance computing installation. The supercomputer achieves a peak theoretical performance (Rpeak) of 3.84 petaflops and a measured LINPACK performance (Rmax) of 2.01 petaflops.

### Performance History
The system was first introduced to the TOP500 list in June 2019, where it achieved a rank of 120th place. Over subsequent rankings, J1's position declined as newer, more powerful systems entered the field: 153rd (November 2019), 196th (June 2020), 231st (November 2020), 280th (June 2021), 342nd (November 2021), 375th (June 2022), 413th (November 2022), 456th (June 2023), and finally 500th (November 2023).

### System Architecture
J1 runs on Linux, the open-source operating system family created by Linus Torvalds. The system utilizes 25G Ethernet for networking, which provides high-bandwidth communication between compute nodes. The supercomputer's architecture follows conventional high-performance computing designs, with a focus on processor density and interconnect performance.

### Manufacturer Information
Lenovo, the manufacturer of J1, is a Chinese multinational technology company founded in 1984 and headquartered in Beijing. The company employs approximately 77,000 people as of July 2023 and operates in the electronics and computer hardware industry. Lenovo's involvement in supercomputing demonstrates the company's expansion beyond consumer and enterprise computing into high-performance computing markets.

## References

1. [TOP500](https://top500.org/site/50329/)
2. [TOP500](https://top500.org/system/179650/)