Thermal Paste
Thermal Paste
Yes, you will want to have thermal paste between your CPU and cooler. It just helps with optimal contact between the two, so the CPU can be properly cooled. If you're just running the CPU for a minute or two, I would not consider it necessary, but for normal operation you will want thermal paste.
The IHS and CPU cooler bases aren't completely flat, with minor irregularities. Thermal paste helps smooth out these gaps, ensuring efficient heat movement from the CPU to the cooler. Whether you're pushing performance or not, thermal paste is essential.