In this blog post the author was experimenting with a script that makes use of the power of GPUs (Graphics Processing Units) as found on modern graphics cards and found it to be extremely efficient compared to the CPU of the main computer. Credit: "The Code Project" news letter.

GPU Password Cracking – Bruteforceing a Windows Password Using a Graphic Card � Vijay's Tech Encounters

The lesson to learn is to make sure that you use long passwords containing obscure symbols, and avoid dictionary words, since simple passwords take seconds to crack.