Hi I just got 2 x 2GB of RAM for X-mas. I installed this on top of my other 2 GB RAM card of the same make and model. When i check system properties, it only shows i have 3 GB of RAM. how the hell did it get that number when I have 3 x 2GB sticks in ? also, when i run cpu-z, it shows that i have 6gb, and it reads each card in the 3 slots.