1. RAM: Increasing your computer’s RAM is one of the most effective ways of increasing your PC’s speed.
2. Processor: Upgrading the processor can drastically improve the speed of your PC.
3. Graphics Card: If you plan on playing games or using any 3D applications, then a better graphics card may be beneficial.
4. Solid State Drive (SSD): Replacing your current hard drive with an SSD can significantly reduce load/boot times and increase overall speed.
5. Cooling System: Make sure your PC has adequate cooling to keep temperatures down and ensure optimal performance.