Articles: Cases/PSU

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I have described and tested different power supply series now being manufactured by FSP Group. The tested units all boast good performance and high build quality. Added their modest pricing, they can be recommended for use in computers of various power needs. Yet it is possible to single out several groups of models that are preferable for particular applications.

First, the ATX-300GTF and ATX-350GTF units are entry-level models that comply with the ATX12V 1.2 standard that is already becoming obsolete. Being a combination of low price and good quality, they will suit perfectly as a power supply for a new, but relatively low-power computer or to replace a disabled PSU in a last-generation computer.

Second, the FSP300-60PN(PF) and FSP350-60PN(PF) models belong to the newer, 1.3 version of the ATX12V standard. They don’t present much interest to the user since they occupy a small market niche. They don’t offer any significant advantages to low-power computers if compared to the GTF series, while the owners of new midrange and top-end computers should consider power supplies of the ATX12V 2.0 standard. I should also note that the 12cm fans of these PSUs are noisier than they might be due to the poor stepping control over their speed.

Third, the FSP400-60PFN model that is also selling as Zalman ZM400B-APS belongs to the ATX12V 1.3 standard, too. This model features an excellent quality of manufacture and a very quiet fan. It doesn’t suit well for powerful computers of the latest generation as it doesn’t comply with the latest version of the ATX standard.

Fourth, the two models of the ATX12V 2.0 standard – FSP300-60THN-P and FSP400-60THN – pleased me a lot, especially the latter model. Alas, the former is much worse in the cross-load characteristics as well as in the ease of use due to the short cables. Well, you can find faults with the cables of the top model, too. The number of available power connectors may be insufficient for some modern systems. If that’s not a problem to you, the models of the THN series are going to be a good choice for a high-power modern computer. They are also free from the defect of the PN(PF) series: despite the use of the same fans, they often work quieter thanks to a more efficient control over their rotation speeds.

Then, the FSP460-60PFN model is an excellent power supply for entry-level servers and workstations. Its characteristics are superb, but its fan is rather noisy at work. For that reason I wouldn’t recommend you to use this PSU in a home computer. The FSP400-60THN would be a better choice, since it can handle nearly any modern computer system. If the noise doesn’t scare you, this server-oriented PSU will work nicely in a home computer, too.

Generally speaking, the power supplies from FSP Group reviewed in this article are typical workhorses. They don’t try to astonish you with an extravagant exterior, shiny cases and blue highlighting, but they do have very good characteristics and ensure stable operation of your computer. So, if you don’t have any extra requirements concerning the exterior of the power supply and if you are not into matching the colors of the screws, connectors and shining-in-ultraviolet cables, you should definitely consider the above-described models when shopping for a new power supply.


Some readers requested me to modify the cross-load characteristic diagrams in some way or another like to use the same scale in all of them, to change the delays of the animation or even to publish three different pictures for the three voltages, to mark the load value in the extreme points of the diagram, to denote somehow the requirements of the standard or some other etalon and so on and so forth… Unfortunately, it is simply impossible to satisfy all these requests as some of them are contradictive and others would greatly worsen the look of the diagrams for some PSUs. So I now offer you a compressed file with source data for the cross-load diagrams and a simple program for choosing the diagram-building parameters manually. Our readers who want to have the most detailed information on a particular PSU may find it useful.

The cross-load characteristics of the tested power supplies (click here)

The program to view the source data (click here)

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