Intel Core i5 9400F 2.9GHz Hexa Core CPU
Intel Core i5 10600K 4.1GHz Hexa Core LGA1200 CPU
Intel Core i9 9900K 3.6GHz Octa Core LGA1151 CPU
Intel Core i5 10400F 2.9GHz Hexa Core LGA1200 CPU
Intel Core i5 10400 2.9GHz Hexa Core LGA1200 CPU
Intel Core i3 10100 3.6GHz Quad Core LGA1200 CPU
Intel Core i3 10100F 3.6GHz Quad Core LGA1200 CPU
Intel Core i3 9100F 3.6GHz Quad Core LGA1151 CPU
Intel Pentium Gold G6400 4.0GHz Dual Core CPU
Intel Core i9 10850K 3.6GHz Ten Core LGA1200 CPU
AMD Ryzen 5 3600 3.6GHz Hexa Core AM4 CPU
AMD Ryzen 5 2600 3.4GHz Hexa Core AM4 CPU
AMD Ryzen 7 3700X 3.6GHz Octa Core AM4 CPU
AMD Ryzen 9 3900X 3.8GHz Twelve Core AM4 CPU
AMD Ryzen 5 5600X 3.7GHz Hexa Core AM4 CPU
AMD Ryzen 7 5800X 3.8GHz Octa Core AM4 CPU
AMD Ryzen 7 3800XT 3.9GHz Octa Core CPU
The CPU (or processor) is the central component of a computer. Everything task that happens on your computer, from running a document to browsing the internet to playing a game, is controlled by the CPU.
CPU power is primarily dependent on clock speed (measured in GHz) and the number of cores. Generally speaking, the faster the clock speed and the more cores a CPU has, the faster it will perform, although it isn't necesasrily the most cost-effective approach to choosing a CPU!
If you're looking to build a PC mainly for home or office tasks, like browsing, e-mail and documents, then you don't really need more than a dual core CPU. If you're planning on gaming, then going for quad core or higher would be ideal, and even more so for video editing or 3D modeling.