Hello, I just bought a corsair h100i v2 aio cooler, I am trying to install it on an am3+ board, I assume the water block is suppose to be touching the cpu, but when I screw the screws on and place the water block on there is half an inch between the block and the cpu, are those screws suppose to behind the motherboard or on the top? The installation guide that comes with the cooler isn't very helpful