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Cooler Master MasterWatt 650 Power Supply Review

The Cooler Master MasterWatt 650 arrives in a dark box which is rather understated. There is an image of the unit bottom right, with some details such as the 80 Plus Bronze rated certification and 5 year warranty.

The back of the power supply box focuses on the zero dBa feature with the unit is under a 15% load. In the case of the 650 Watt unit we are reviewing today that would mean the load has to be less than 97.5 watts before the zero fan feature would implement.

Inside we have a regional specific power cable (in our case it wasn’t a UK one for some reason), a bundle of ribbon style modular cables, product literature and mounting screws. It is a pretty spartan bundle, as we would expect at the price point.

The MasterWatt 650 is not a pure modular design so there are some hard wired cables coming out of the chassis itself (picture above right). All of the modular cables are high quality with Cooler Master opting for 16 AWG cables for the PCI-e cables.

The diagram above shows that the 650 watt unit ships with 2 PCI-e 6+2 pin cables which are 550 mm + 120 mm long. This is identical to the higher output 750 watt model.

There is not much protection inside the package – its basically a simple cardboard box for shipping. Cooler Master however are using a thick padded bubble wrap packet around the power supply which looks to offer decent protection during shipping.

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