OCC has published a review on the XFX XPS-850W Power Supply

Cast your eyes back to page three and the cable length table. The peripheral and SATA cables are supplied in three different lengths - a nice touch, which may go a little way to helping with cable management and that uncluttered look. One small bone of contention is a Mean Time Before Failure (MTBF) figure of 100,000 hours quoted at 25C. This temperature is totally unrealistic, especially if the power supply is heavily loaded.

XFX XPS-850W Power Supply Review