XSReviews has reviewed the Zalman 770 XT PSU
A quote from the article:
>> Zalman 770 XT Review
Choosing a power supply gives endless choice with seemingly hundreds of units to choose from; with different watts, colours, sizes and styles. But, it all boils down to two things -- stable rails and efficiency. With poor performance in these two areas, no matter how glamorous or how quiet the unit may be, it's not really up to scratch. At XSReviews today, we have a 770W unit that comes from a very reputable company. Introducing the Zalman ZM770-XT Z-Machine Extreme PSU, let's see if it can blow us away with its performance.
>> Zalman 770 XT Review