Can't because the PC will only start up and nothing else when 4 modules input. I now have 2 modules(4GB) because 3(6GB) caused trouble too. Sometimes it worked, sometimes it didn't. Wanted me to update BIOS and said BIOS was corrupt when I had 3 in, and then all of a sudden it worked, but all the drivers were gone, then it stopped working, and then it started work perfectly for 20 min, then everything crashed and bluescreen. Weird...anyway as said I now have only 2 modules in as in the beginning.
Corsair VX550W