i have 3 256 sticks and one 512 stick. if i put all 3 "256 sticks in, i get back that i only have 256 ram installed, if i have 512 +2 256 in it comes back with 768..... is my mobo screwed is is it because my ram is supposed to be paired. i.e. 2 512 sticks and 2 256 sticks or 512 sticks or etc..