Not exactly a Windows problem,but while amongst PC users-specialists,might aswell ask freely. Just upgraded from 775 to 1155 socket with a MSI P67A C43 / i5 2500k and i am asking for some suggestions on 4GB modules running at 1600MHz.Height is not a problem,i am planning to cool CPU down with some H80 or 100 in the near future.Should i go with 1.5V sticks,1.65V,compatibility issues with any specific brand,things like that,any clues?