Building a new PC from old parts? Don't reuse these components

When you purchase through links in our articles, we may earn a small commission. Not every old PC part deserves a spot in your new build. Here's how to tell what's safe to reuse and what to replace. When building a new desktop computer, it makes sense to reuse as many components as possible from your old machine. That very flexibility is one of the greatest advantages of a self-built system!