I'm going to be getting an i5 3570k and a Z77 Asrock Extreme 4 Motherboard. I've heard that Ivy bridge has optimum compatibility with 1.5v RAM. The RAM I'm looking on getting is Kingston Beast 8GB. These kits are usually 1.6v etc, but there is a kit that is 2133mhz which when using XMP profile 2 is underclocked to 1.5v 1600mhz; will this be alright to use with the combination that I have chosen? - Does it really matter about the volts?
http://www.kingston.com/en/memory/hyperx/predator/beast?sk=hxpref_000000
http://www.kingston.com/en/memory/hyperx/predator/beast?sk=hxpref_000000