Sites Lightning
| System Name | Lightning |
| Site | Los Alamos National Laboratory |
| System Family | Linux Networx Evolocity |
| System Model | Evolocity II (E2) - Opteron |
| Computer | Opteron 2 GHz, Myrinet |
| Vendor | Linux Networx |
| Application area | Not Specified |
| Main Memory | 5632 GB |
| Installation Year | 2003 |
| Operating System | Linux |
| Memory | 5632 GB |
| Interconnect | Myrinet |
| Processor | AMD x86_64 Opteron 2000 MHz (4 GFlops) |