The 5 amps on the power supply brick that came with the strips will OUTPUT up to 5 amps. This does not mean your strips will draw a full 5A even at full brightness with all chips (white) running. It is probably sized to power 10 meters or more of the strips. It will work fine. Hook up + to 12v (yellow) and - to black. Simple as that. A molex power connector has more than enough power to operate some strips. They draw less than a cold cathode tube will.
8/31/14 at 2:17pm