Parts/CPUs/Fujitsu SPARC64 VIIIfx
Why this part
Codenamed Venus, and built around a target of performance per watt at a time when the rest of the industry was still buying performance per socket. 58 watts for 128 GFlop/s made the K computer the most efficient machine in the world at its scale, and it needed to be: 88,128 of them at any higher power draw would not have fitted the site's electrical supply. Fujitsu also kept it a single-socket design with no accelerator, so every one of K's 705,024 cores ran the same code with no host-device split at all, which is why applications ported to it almost immediately.
Systems using this part
- Systems
- 1
- Rmax underneath
- 10.51 PFlop/s
- Units recorded
- 88,128
| System | Role | Country | Units | System Rmax | Supplied by | Rank |
|---|---|---|---|---|---|---|
| K computer 2011-06 | CPU | Japan | 88,128 | 10.51 PFlop/s | Fujitsu | #1 → |
“Units recorded” sums only the edges where a public source states a quantity. It is a floor, not a total, and should never be read as installed base.