Ultra X-Finity & X-Pro 800W Power Supplies

by Greg King on July 5, 2007 in Cases & PSUs

It’s hard to find someone who can fully utilize a 1Kw power supply, while 800W seems to be a sweet spot for most high-end rigs. We are taking a look at two such power supplies from Ultra, the X-Finity and X-Pro.

Page 3 – Testing, Final Thoughts

To stress the Ultra power supplies, or at the very least, attempt to push them at load, we will simply hook up anything that we can to the power supplies and see how they handle it. While Techgage has access to a proper load tester, this editor does not and therefore this real world approach is what is being taken.

Once our initial results are recorded, we then place the power supply in a makeshift hotbox and heat up the enclosure to approximately 115 degrees Fahrenheit. Again the power supply was loaded and left for 2 hours. After this time, we went back and tested the rails.

To obtain our results we are using a generic Radio Shack multimeter that I have had, and rarely used, since college. To stress these power supplies as much as we can, we are using the following hardware.

From looking at the graphs, its apparent that the rails of the Ultra power supplies are quite solid. Never wondering outside of the 5% acceptable give, the power supplies were capable performers in all of our tests.

To bring things to a close, we are left impressed with all that the power supplies offered. While I am still not sold on the idea of the X-Finity’s cabling, it is still quite bendable and it does allow air to flow across it easier.

One thing that I would like to see in future power supplies from Ultra is the incorporation of a 120mm fan. This allows the PSU to operate much more quietly but still move a decent amount of air. One thing to point out is that while these use a pair of smaller 80mm fans, they were not terribly loud when compared to the Silver Power SP-1000W.

The most notable feature of the both of these power supplies is the fact that once the system is powered down, the fans in the power supply continue to spin for a bit longer, to continue cooling the hardware before it shuts off itself. This is a nice idea but I am not sure how much it adds to the overall longevity of the power supply.

With everything taken into consideration, the Ultra 800W X-Pro and X-Finity both receive a 7 out of 10. They work well, are relatively quiet and provide more than enough power for most.


  • 800W is a lot
  • Fully sleeved and covered cables
  • Not a huge power supply
  • Fans spin for a short while after system is powered down
  • Solid and reliable rails, even under extreme conditions.

  • Not modular
  • 80mm fans can get loud

Discuss in our forums!

If you have a comment you wish to make on this review, feel free to head on into our forums! There is no need to register in order to reply to such threads.

Support our efforts! With ad revenue at an all-time low for written websites, we're relying more than ever on reader support to help us continue putting so much effort into this type of content. You can support us by becoming a Patron, or by using our Amazon shopping affiliate links listed through our articles. Thanks for your support!