Is that with four chips?

Yes (can't be otherwise). 133GH/chip, if every chip requires $150-250 in VRMs alone it's out of the market already.

Which is why the chips have been sitting on the shelf and are being sold. KNC have the scale, all the design done and just need to press the button to have them made into more Jupiters, but they're not.

If it takes downclocking to 133GH/s per chip to get to 1J/GH, it likely isn't worthwhile to pursue.