After reading this again, it seems KNC shipped out the Nov Jupiters highly overvolted? My Oct Jupiters were already near yours in the -.08 -.09 range
What are your SPI volt and Freq? mine are 2.25 and I use either 250775 or 267130 hertz with a 241 clock
I am about to play around and see what I can get at lower watts since one miner is about 880w at the wall and 700Gh.. I wonder if I could get 650Gh at 700watts
that's what I will shoot for
Good luck, hope you can save some power without reducing performance! My SPI is fixed at 1.95V and the frequency is 201442Hz - I haven't played around with this much as most posts indicated there was no change in performance.
But... My clocks on the November Jups are 2C1
and this makes all the difference.
I ended up seeing that I was pretty good on watts/performance since I was incline to start from low power and work my up when I initially overclocked them.. so instead I raised the SPI to 2.85, the Freq to 292k and a little more volts on the dies with now a 251 clock.. that gives me even less HW errors and a bit more Gh but yes a power increase
You have the 8 VRMs (which was my holy war with Bitcoinarama early on to get him to talk truth on that) and that allows high OC to be more stable and less risky
One of my miners is a bit trickier since it has one original 8 VRM Oct boards so I have to run that one at lower clocks and higher die voltage to make it play nice with the SPI values that the others are using
or maybe alot i dunno...but i'm on 291 now and temps are 33, 34 n 36 
tryed the heat trick n more volts for that die...got some to come back on but not all 
