[KozmoNau7]

My two main PCs are a Phenom II-based desktop and a Thinkpad X220i (with the lowly Core i3, even!). Both are perfectly functional and usable today, with a few minor upgrades here and there, the usual SSDs, more RAM and a Radeon RX560 for the desktop.

The Thinkpad is obviously no powerhouse, but still works great for general desktop use, ie. browsing, email, document editing, music, video (1080p h264 is no problem). The desktop plays GTA V at around 40-50 FPS at 1080p with maximum settings. And this isn't some premium build, it's a pretty standard Asrock motherboard with Kingston ValueRAM and a Samsung SSD.

Decade-old hardware is still perfectly viable today.