With a few tweaks and new firmware, the Pi 4 can get faster overclocks than ever before.

Source: Raspberry Pi 4 Can Now Overclock to 2.147 GHz. Here’s How. – Tom’s Hardware

The Raspberry Pi 2 is a lot faster than its predecessors, but you still might want to overclock it for the best possible performance. Blogger Hayden James breaks down what each overclock setting does and shares some configurations for better performance.

Full article here:
What the Raspberry Pi 2’s Overclock Settings Mean (Lifehacker)