DriverHeaven.net posted a review on the Ultra X4 750W Power Supply
A quote from the article:
>> Ultra X4 750W Power Supply Review
Ultra's latest PSU series, the X4, consists of no less that 7 units with an output ranging from a meager 500W up to a mind blowing 1600W. The X4 series is the successor to the very successful X3 series which has been Ultra's flagship range of products for several years.
>> Ultra X4 750W Power Supply Review