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Ultra X4 1050W Power Supply Review

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Closer Look (The Power Supply):

The Ultra X4 1050W with its satin black painted case and silver and black Ultra X4 logo at the cooling fan grill center. 


















The rear panel showing the hexagonal-holed exhaust grille, mains on/off switch and IEC mains input connector and the front panel with the modular cable connectors. Unlike most other power supply manufacturers that use 6 and 8 pin PCI-E type connectors for the modular cable connections, Ultra have used connectors that reflect their use. The connectors for the peripheral modular cables use 4 pin peripheral connectors and the SATA connectors, although not actual SATA connectors, they are five pin connectors carrying 12V, 0V, 5V, 0V and 3V3 in the same order as the SATA connector.



Both sides of the power supply sport the Ultra X4 logo pressed into the metal.



The 135mm cooling fan sporting a silver and black logo at its centre and the underside of the power supply showing the specification label, warranty seal and test labels. The text along the bottom of the specification label, written in red, is in English and German! I know this is a very minor point but if the packaging gives all its information in English and French why does it suddenly switch to English and German? There are three round black labels, one of which says "HI-POT PASSED", what does it mean? For anybody that's interested, the power supply insulation is tested using a HIgh POTential or voltage (can be 500V, 1KV or higher) between the earth conductor and the live and neutral conductors connected together and a measurement made of the resistance. This test forms one of the main components of an electrical safety test and looks for any dangerous leakage paths that may exist, resistances in the order of 2 megaohms or higher are expected.



The photograph on the left shows the hardwired cables, whoops there are none, more on this later. The full set of modular cables on the right.



The 135mm cooling fan is an Ultra DC12V model DFB132512H, but a little research reveals it is produced by Young Lin and runs at 3W, widely used in power supplies and a good quality DC brushless fan.


Unlike some other review websites, I don't delve too far into the printed circuit board trying to find any manufacturer or model numbers. Don't get me wrong, I have a good look, but if it means removing components and/or wires to find any information, then I don't bother. I don't know who made the board in this unit but all I can say, going of what I can see, is that it is very well made, it uses top quality vaned heatsinks and 105°C rated electrolytic capacitors by Teapo - a reputable manufacturer. To have a printed circuit board made by one of the mainstream manufacturers is all very well but at the end of the day, a well made board that gives great performance is all that matters!


Well made with neat cabling gives a good first impression.



No problems that I can see, so let's see how it performs.


  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specification & Features
  4. Testing: DC Voltage Load Regulation At 110VAC & 230VAC
  5. Testing: Efficiency, Power Factor & DC Quality
  6. Testing: Temperature, Noise Level & Fan Speed
  7. Conclusion
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