It’s really very simple. You download the program and it runs as a screen saver. It doesn’t slow down your computer while you are using it. It just runs when you aren’t using it. The idea is to combine the strength of a large number of small computers to do what one big computer couldn’t do.
- Examining the entire human genome for instance could require up to 1,000,000 years of computational time on an up-to-date PC.
- Using a commercial 1000 node cluster would require 50 years and, while faster, would still be impractical.
If this interests you at all I have a link to Grid.org on this page. Check it out and VOLUNTEER YOUR PC.