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The company claims that its ultra-green server, dubbed the Janus II, delivers 529 gigaflops per kilo-watt, compared to the previous best from a x86 server of 290 gigaflops per kilo-watt.

The Janus II consists of two eight-core based servers

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in a 1U package. Each server features a pair of 2.5GHz Xeon quad-core chips, 160GB storage and 4GB RAM. To reach its low energy use targets, the Janus II employs native EEC RAM, rather than the more energy demanding FB-DIMMs, a highly efficient power supply unit, and low wattage hard disks.

Energy efficient systems can have a real impact on a company's power costs. VeryPC says that a customer replacing 84 1U servers with a full cabinet of 42 Janus II units can reduce their electricity bill by around £15,000 a year.

"Janus II sets a new record for server efficiency," says VeryPC's managing director, Peter Hopton. "Assembled in Sheffield, the unit can be customised to the customer's needs exactly, minimising waste and logistical energy."

Read our review of the original Janus server here.