How Do I Know When to Upgrade My PC or Just Build a New One?

Dear Lifehacker,
My computer is getting a little old. I built it myself, but I'm not sure whether it's worthwhile to upgrade individual things like my processor or video card or whether I should just start from scratch and build a new rig. How can I tell when it's time to upgrade and when I should start over? » 5/05/14 2:36pm 5/05/14 2:36pm

New Type Of Memory Could Boot Your Computer Instantly

Imagine turning on your computer from a powerless state and instantly seeing your desktop without having to wait through a lengthy loading process. NC State researchers have developed a device that could make that happen. » 1/20/11 2:00pm 1/20/11 2:00pm