Power Draw Tests
With the higher power rating on the new 3970X it comes as no surprise that it sucks down more power.
Overclocking of course draws even more power thanks to the boosted voltages. Adding more video cards into the mix means that a serious power supply is going to be needed on this kind of setup. Considering the associated cost of the CPU, that shouldn't be an issue for the purchaser.
Heat levels also seem a little up due to the increased wattage. Intel recommends the closed circuit water cooling loop like they did on the 3960X.
You're going to want to at least opt for a high-end air cooler at worst.