Upgrading an older desktop doesn't always require ripping out your motherboard and RAM. If you're still on an AM4 platform, the AMD Ryzen 7 5700X is a perfect way to breathe new life into your PC without starting from scratch. Amazon has the 8-core, 16-thread chip available for $159, which is a solid price for gamers and multitaskers who want reliable performance without the premium of a next-gen socket.