Author:  Mike Boesen

Last updated:  11 April 2007 Time: 14:00

I am sometimes asked the question "what is a good power supply unit (PSU) to buy?".  There is no simple answer because it depends on a number of factors. The very informative web site provides a detailed article on the "basic" considerations that need to be undertaken:  The article lists these as evaluation criteria for PSUs:

1. Stable power delivery under load
2. High efficiency
3. Good cooling
4. Low noise operation
5. Long term reliability.

I would add a 6th point:

6. How much you are prepared to pay (because prices range from about $40 (AUS) to $200 (AUS).

This article lists pcsilentreview's recommended PSUs:

In Australia there are a number of web sites where you can buy PSUs.  Some of them provide excellent information about the products stocked and sometimes provide links to reviews.  One excellent site from which I have bought a lot of PC gear is

Even if you decide to go to the market to buy a PSU there you can undertake homework first through the sites I have referred to above.  Without doing such homework a trip to the markets is not going to be very illuminating and will be confusing because you will find PSUs that vary in price from about $35 (AUS) to about $180, and the quality of technical advice given by the merchants will be generally poor and most times biased.   If you feel you do not have the technical savvy or inclination or time to do homework first, then here are some possibly useful suggestions:

If you end up feeling that all this is too complicated and you don't want to fork out big bucks, and live in Canberra, I'd recommend going to ATM in Belconnen and buying a 400W PSU from Eva - cost at April 2007 is $45 (AUS).   Although relatively light weight and not a name brand, their current 400W PSU does have a large fan and the baffling ensures a good airflow.   May well last the life of your PC.

If the only thing wrong with your PSU is a noisy fan is IS possible to replace the fan but that requires:

As you can see, that's just too much trouble and has too much risk for the the vast majority of PC users.

A final comment - "oiling the bearings" of a noisy fan is highly inadvisable (and in some cases inappropriate) for a number of reasons, will only be a temporary fix and involves most of the disassembly and re-assembly work described above.

The silentpcreview web site is a great site for information about PSUs and all hardware things that would be of interest to someone who is building a PC.  It provides comprehensive reviews and testing for all the major hardware components, including cases, PSUs, CPUs, coolers, etc.