Verdict:

Modular and efficient, but the fan is far too noisy.

FSP is one of the few PSU companies that has a UK office, so any support queries can be dealt with locally, rather than having to ship faulty units to Europe or the Far East.

Like all retail FSP PSUs (the company is one of the largest manufacturers of rebranded PSUs), the Everest 800 is housed in a compact blue box. According to FSP, its main selling points are its 800W rating, modular cables, four 12V rails and four PCI-E cables. Each of the 12V rails is rated as being capable of delivering 20A, but the combined rails can't produce more than 64.6A.

Helpfully FSP prints which rails provide power to which connectors on the side of the box, enabling you to wire up your PC correctly. The 6+2-pin and 6-pin PCI-E cables hard-wired into the PSU are powered by 12V2, while the modular 6+2-pin and 6-pin PCI-E cables are powered by 12V4. The rest of the power is divided up with 12V1 powering the CPU, and 12V3 the motherboard and disk drives. The Everest 800 has the same cooling system as the Everest 1010, and although the 120mm fan is quiet at 50 per cent, it becomes far too noisy for comfort when the PSU is working flat out producing 800W.

All of the Everest 800's rails withstood the pounding to which we subjected them, with their output remaining well within the tolerances stipulated by the ATX spec. The PSU also proved to be efficient, averaging 83 per cent at full load drawing 963W from the mains to produce 800W. However, the very noisy fan makes it impossible for us to recommend the Everest 800 when quieter 800W PSUs are available.

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