btw, if it doesn't have a pad, try applying some heat-sink grease too the CPU between the heat-sink and the spreader. you might not be transferring the heat or there might be a gap (I think there is a pad that is supposed to be on it). So you might also need to get a pad. Put it on the CPU first, then put the heat-sink down. If the grease doesn't hit the bottom of the heat-sink, you have a gap. you would need to get a pad to transfer the heat.

I would have to check mine when I get to it, but i will let you know what bridges the chip and the heat-sink to see if it is a direct contact, or if they have a pad.