The Zalman ZM400B-APS is a solid ATX12V v1.3 compliant PSU that is very quiet at lower power levels. The current capability of the 12V line is high enough to handle all but the most loaded systems, the high >75% efficiency ensures it stays reasonably cool throughout the power range, and it can handle the heat all the way to max power at 50 degrees C. Check out the complete review.



Link: SilentpcReview