The worst PC components in existence?

[piccolo289]

I have been researching the history of pc building(1990-now) and ive heard that the early pentium 4's were quite possibly the worst cpu ever made, because all it had to claim was a high clock speed. Ive also heard that the Athlon x2 64 demolished it, and the late pentium 3's were actually better than it. So that got me wondering, what are some other bad pc components, things that never had the right of existing on store shelves. Overpriced, Underpowered, i dont care. Just suggest it!