The chinese manufacturer Sansun isn't too well known yet, because they are a rather new company. If they continue delivering such solid products, I'm sure that this will change in no time.
For a price for which you often get only a plain and unsleeved power supply, Sansun is giving you dual 12V rails and a modularity feature which is usually found only on much more expensive PSUs. All cables are sleeved as well which helps keep your case look clean. Also the important qualities of a PSU like voltage stability and fan noise look good.
The Thermaltake ToughPower offers 550 watts to satisfy all your power needs. Two 6-pin PCI-Express connectors are available for SLI or Crossfire. On top of that you have four SATA and eight 5.25" connector. Two independent 12V rails can supply a total of 38A. During our testing we saw impressive voltage stability and very small ripple.
MGE targets the extreme gamer/modder niche and the build-your-own mainstream market of PC enthusiasts with this power supply. It features a unique blue anodized design with side windows in the PSU case. A PCI-Express video card connector is available, all cables are sleeved. During our testing we found that the PSU can supply stable clean voltage. Another plus is that the retail price of $60 is quite competitive.
Cooler Master has engineered a great PSU which has a PCI-Express Power connector and can supply 12V from three rails. Most PSUs have only one or two. For the visual aspect there is a Watt Viewer which goes into a drive bay and automatically displays the current power consumption of your computer - without the need of additional software.
Sirtec may not be one of the known big players of the PSU industry, but in fact they are a huge OEM producer of power supplies, for example for Thermaltake and Chieftec. We test Sirtec's 410W unit which offers a beautiful chrome finish and a low-noise fan at a very competitive price.
Thermaltake has put together a nice package consisting of a PSU with modular cables, a 5.25" drive bay real-time Watts Viewer and an additional 120mm case fan.
Today we have a very special PSU on the test bench - it is completely passive. Fortron trusts their design so much that they say a backup fan is not needed.
I was surprised to see the Fortron Sparkle ZEN power our demanding test platform without any load problems. While the electrical noises were definitely annoying, they are only noticable on higher power systems.
Silent and powerful? Is the included CPU HSF worth it?
The 5V and 3.3V lines are exceptionally stable. The 12V line tends to fluctuate a bit, but stayed above 12V at all times. All lines are well within the limits set by the ATX Specification.