Everyone would love a supercomputer but with a price tag of around $100m each they are not easy to come by.
But in the United States staff and students at Virginia Tech have built one of the world's most powerful supercomputers for just $5m by plugging together hundreds of the latest computers from Apple.
The project involved placing 1,100 brand new Apple G5 towers side by side, making it the world's most powerful "homebuilt" system.
It is capable of 17.6 trillion floating point operations per second, with a combined storage capacity of 176 terabytes.
"Each individual G5 is a dual processor, 2GHZ machine with 4GB of memory. So it's extremely fast," said Pat Arvin, Project Coordinator at Virginia Tech.
The network is linked using 2,900 cables and runs at about 100 times faster than an average corporate network.
News source: BBC News