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Cooler Master’s new MasterWatt Lite PSUs use just 0.5W on standby

Cooler Master has a new range of MasterWatt Lite power supplies and they are so efficient, that when in standby they use less than 0.5 watts. Built to ATX specifications, the new units have double layered EMI filters and quiet cooling and come in a variety of wattages.

Picking a new power supply is rarely easy. It's the least sexy PC upgrade part and yet if you don't pick a good one, you put your much more expensive components at risk of damage. You can also end up wasting a lot of money on power you aren't using if the efficiency of the unit is poor too.


Cooler Master's new MasterWatt Lite units aren't the most efficient in the world, though they do comply with 80 PLUS standards for around 85 per cent efficiency. This is no Gold or Platinum level unit, but it does at least have a base level of efficiency and maintains more than 82 per cent whether running at 20, 50 or 100 per cent capacity. Where it really shines though is when in standby mode and the system is turned off. In those cases, all of the MasterWatt Life units consume only 0.5W of power.


They come with active PFC and PWM technology for added stability, as well as over temperature protection and a quiet 120mm cooling fan.

Prices start at £40 for the 400W model and range up to £65 for the 700W version.

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KitGuru Says: This is not likely to be a PSU for your high-end gaming rig if you want ultimate efficiency, but if a system spends a lot of time powered down, the new MasterWatt Lite units could be perfect. 

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