Here are the specifications:
A potential problem with these kits is that they need 1.65V to 1.75V to run at the advertised clockspeeds and timings. We'll need to wait until there are some reviews to know for sure, but it's highly advised not to go over 1.65V on the Core i7 platform as this may fry your processor.DDR3-1600+ & 1333+ 3GB/6GB tri-channel module kits are tested at 1600MHz/1333MHz Test in tri-channel configuration at latency settings 8-8-8-24 2T for DDR3-1600+ and 7-7-7-20 2T for DDR3-1333+ at 1.65V-1.75V SPD (Serial Presence Detect) programmed at JEDEC standard for basic system booting
Source: TPU