so, @ work we did a little testing with an old dell(was really top of the line in 2004..) anyway, we did put 2x1gb PLUS 2x512mb in at the same time, which gave us something like 3072mb ram WORKING PERFECT. now, i am curious if this would work on my own?(described in signature). i already have 4x4gb, and want to add 4x8 gb to that( total 48 gb ram). what pros and cons am i facing in that case, like would quad channel memory be gone or what? would it even work with this big amount of ram? just to add this: in the dell's case it was 2x1gb SAMSUNG and 2x512mb unknown brand.. those had 1.8v, and i can't remember the speed or timing on them.. and in wy case i have 4x4gb corsair vengeance 1600mhz, and what im gonna add is 4x8gb of the same ram, only different size on the sticks, and they are 1.5v, 1600 mhz and are 9-9-9-24 =)