I have a Q6600 and it seems to be running hot. It's stock, no overclocking. With the OEM heatsink I was getting idle temps around 55C/131F, so I replaced it. So I replaced it with a Scythe Ninja Heatsink with a 120mm fan and a backplate to help secure it onto the motherboard. My temperatures improved and I was sitting at 46C/115F idle (system: 35C/95F). Still not too happy with these temperatures, I organized my cables for better airflow, and removed the heatsink, cleared off the old thermal paste and applied some Arctic Silver 5 High-Density thermal paste. This stuff is thick, it almost has a wet concrete texture. So I applied a thin even layer of the stuff on top of my cpu using my finger covered in a plastic bag. Previously I've just applied a dab of the stuff and then let the pressure from the heatsink distribute the paste over the cpu. So now my computer is back up and running, and I was expecting some great new temperatures... wrong. I'm still getting the exact same temperatures in SpeedFan (cpu: 46C/115F, system:35C/95F, ambient:31C/88F). In the past, I thought maybe SpeedFan was getting false readings, but the bios shows similar temps. Here is the current insides of my case: My airflow could maybe use improvement as I have warm inside air being blown accross the CPU Heatsink. The front intake is a weak 120mm fan that came with the case (not sure how many RPMs). I'm also planning on installing a small fan 80mm fan on the case's side panel to blow air directly onto the CPU. Any ideas on what I should do next? What's the best way to apply thermal paste? Is airflow the main culprit? All suggestions are welcome.