Hei guys, i'm new here. I have a MSI K9VGM-V motherboard and recently i bought a 2gb ddr2 kingmax 800mhz ram component, but when i plug it in my pc won't start. In the other slot (i have only 2 slots for RAM memory) i have a 1gb DDR2 elixir 800mhz component. The question is, why my pc doesn't start? I must have the same memory or what ? e.g. 2 x 2gb ddr2 800mhz or 2 x 1gb ddr2 800mhz