I have been having some odd issues after applying AS5. I did it to both CPU and GPU, just applied it to the chip, no need to apply it to the heatsink as well. I did see a noticeable temp. decrease. The only odd porblem I have noticed, is when the CPU temp. gets above like 55, and the fan kicks up to a higher speed, it never goes back down a a slower idle speed, even though the CPU is running at like 38 lol. I have no idea why it is doing this. When I had the original ceramic cooling setup, the fan would adjust speed according to temp. Now when it gets too warm, it just stays up there until I reboot. But when ur gaming, ur CPU is gonna get a little toasty.