Overall, both the ZM400A and the ZM400B are excellent power supplies. Their voltages do not fluctuate even under heavy load and their noise level is minimal. I highly recommend them for those who are looking for silence as well as reliability in a power supply.
But don't expect them to be cheap though. They should be retailing at about USD 80-85 (RM 300-320), which is pretty expensive for a 400W power supply! Well, good things never come cheap! So, if you can afford it, this is a power supply you should definitely consider.
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