The XFX 750W Black Edition needs 157 feet not including heatshrink. We have made a power supply database so we know how much to quote when people inquire for sleeving work.
A good rule of thumb is to measure, or look up the specs, plan out what cables you will be using to find the proper length and then add about 25-50ft (this is purely opinion, but it has always served me well and ive never had to waste money getting more shipped.), this way you can make sure its perfect and you dont end up having to leave your job looking dumpy because you ran out of sleeve, you should never have to settle for less if it can be avoided by better planning. Or if you wanted to sleeve something else (front panel and so on) it wont be an issue. It is always better to have more than not enough.
Edited by Lutro0 - 7/11/11 at 11:24am