What are the fastest computers?
supercomputers. Big Blue's (IBM) BlueGene;
Each company offers its own array of expensive computers. Dell now owns Alienware who has some of the most expensive and fastest gaming computers on the market. Apple has the Macintosh desktop which can cost in the tens of thousands but isn't necessarily the fastest machine in the world. HP offers the Voodoo PC line. Custom built computers can be faster than nearly any computer you buy and cost you half the price, if you…
The fastest and most expensive computer would have to be a homemade computer. Not a brand you can buy all ready to go. Some homemade computers can cost a total of over $10,000 when fully modded. The fastest and most expensive computers are always the ones called Supercomputers. These currently compute in the petaFLOP rate and usually cost from $10,000,000 to $100,000,000. Some are commercially available, some are custom built to a contract.