Hello! I am in the process of choosing parts for a new system and recently saw that both the SuperNOVA P5 and SuperNOVA P6 line of power supplies debuted no later than a few months ago. There is not much literature between the two yet, and so I wanted to ask what the key differences were so that myself and others can make an informed decision?
 
From just comparing both 1000W examples side-by-side using the product comparison tool, I observed the following:
 
- the SuperNOVA P5 is $50 less expensive than the SuperNOVA P6
- the SuperNOVA P5 is 10mm longer in length (150mm versus 140mm in the SuperNOVA P6)
- the SuperNOVA P5 comes with 13 sleeved cables, while the SuperNOVA P6 comes with 9 flat cables
 
I will admit to only having a surface level understanding of power supplies, but both are 80 Plus Platinum rated. It seems that the SuperNOVA P6 has the advantage in smaller form factor, but if that is not a concern it appears that the SuperNOVA P5 matches the SuperNOVA P6 in some places, and offers more for less money (namely the cables. Flat or sleeved is probably up to user preference). Unless there are construction quality differences that I am not seeing?
 
Thanks to anyone who reads this, and for your assistance in clarification.

Thank you very much for responding. Actually it turns out that, later in the day yesterday (September 23rd), a press release for the SuperNOVA P5 lineup became available. Indeed, much is similar between the SuperNOVA P5 and SuperNOVA P6 series. But I since observed a couple new distinctions to add onto my original post:
 
- the SuperNOVA P5 does not emphasize any sort of double OPP (Over Power Protection), unlike the SuperNOVA P6
- the EVGA ECO Mode on the SuperNOVA P5 still makes noise to some degree—roughly 10 dBA from 0-70% load—whereas the SuperNOVA P6 is capable of 0 dBA operation from 0-40% load
 
I can see both of the above functions (in addition to the case sizing and cable design) as key selling points that help distinguish the SuperNOVA P6 lineup and its additional cost. Below are the noise and system load graphs from each of their respective press releases for emphasis. Hope this helps others with their parts choice decision.
 
EVGA SuperNOVA P5 1000W

 
EVGA SuperNOVA P6 1000W