Wtf only 400 ?!?
Have you checked with latest firmware if one of the boards is defect ??
How many boards does the machine contain, did you check if there are really 4 asic boards ?
Its total bs to say its an early model because that has nothing todo with the performance.
I own a october model and it does run pretty nice

Ah! I found out I was on the old firmware, Sorry guys, I dont know much about these Jupiters. Probaly the guy who sold it to me thought I would figure it out myself to upgrade the firmware

I will upgrade it to the latest 0.99.2 firmware state don their site. This is so embarassing

Haha, yeah Jupiters are finicky sometimes. So you are no longer selling?