Pros: 1.5v means less heat and more room to OC
Cons: A little pricey compared to 1.65v units
I got these specifically because it was the highest clocked 1.5v quad channel kit available that would fit under an NH-D14. Thanks to the removable top fins (red), these fit under my massive air cooler with plenty of clearance to spare. If you've got an x79 setup and plan to go with a large tower cooler this is the RAM you want. I've had no heat management issues whatsoever without the top fins even though 3 of the 4 sticks are physically under the heatsink (and thus get less airflow than they would normally). I attribute these excellent thermal characteristics mainly to the relatively low voltage, and I'm perfectly happy with the stock 2133mhz clock speed.