Looking to remove the Hynix 4GB(x2) 1600mhz and replace it with corsair vengence 8GB(x2) 1866mhz or Gskill rip jaws 8GB(x2) 1866mhz. I heard good feedback on rip jaws and someone told me that corsair even though they say it is 1.35volts(tested) it's actually 1.5volts. Any suggestions on which one to use. This is my first time at this so any help would be great.