When I install ram in slots 1 and 3, the computer doesn't boot, it tries to but resets after a couple seconds and keeps on trying until I turn it off. When I install it in slots 2 and 4, it works. When I install the ram in slots 1 and 2, it works but its in a single channel. Now that I type this, I should probably test slot 3 to make sure that it works along with slot 4.