The total combined performance for all 500 systems reached 4.92 petaflops per second, compared to 3.54 petaflops per second in November and 2.79 petaflops per second a year ago. A petaflop equals a thousand teraflops.
Other trends: The number of systems using Intel processors increased slightly from November to 289 from 261. The second most commonly used processors were the Opteron family from Advanced Micro Devices, followed by IBM Power processors. Dual-core processors were the dominant chip architecture, with Intel's Woodcrest chip showing the most growth to 205 systems from 31 in the previous list.
Clusters remained the most common architecture, accounting for 373 systems, or 74.6% of the total.
The United States remained the leading consumer of high-performance computing systems with 281 of the 500 systems. The European share rose to 127 systems from 95 in the previous list. The Asian share fell to 72 from 79. The average age of a system in the Top500 was only 1 year and 2 months.