Here's how I made my PC run cooler without installing any more fans
Installing more (or faster) fans isn't the only way to make your PC run cooler and bring temperatures down. There's one thing you should do first.

We're always looking at ways to minimize the impact of heat generated by internal components. The primary culprit is the central processing unit (CPU), requiring dedicated solutions with air coolers or all-in-one liquid kits. How one goes about cooling their CPU (and the rest of the system) is largely the same from build to build, but it's always important to remember this one trick that I use to keep temperatures within optimal ranges for maximum performance.