I use it with two 2.1 ghz machines generally when I get around to doing final renders, especially if I'm using anything above the "regular" render settings (Superfine AA (16rpp) or up), and it makes a big difference. Generally cuts the time in half, which is a godsend considering how long some of my renders take. The render time for the first image I put in my gallery here took 1d 4h ~30m to render using the two machines. Regards.