Attached Link: http://www.beowulf.org/

What you're really asking for, d4500, is an OS and software that are written to support multiprocessors. They exist, but mainly for simulation work using very expensive multiprocessing computers (like Cray). The software running on these is tailor-made using coding techniques and compilers that understand how to manage code running over multiple processors. Dual processor support is nice, but, as you said, requires OS support as well as application support to be of any use. Actually, 2000/XP Pro are capable of multiprocessor support (more than just 2). Not certain what the limit is - might be 4 or 16 (?). Still, find me a standard PC motherboard that has 4 or 16 processor slots and we can call it the "Holy Grail". I'd love to be able to pool together the power of a dozen computers - I have two desktops and a laptop of my own, plus another seven or eight are being used by the admin as servers, etc. It'd be nice to increase from 2.5GHz to 10GHz or so. The program on Linux lets you set up a machine "cluster". It is called Beowolf - see attached link. The downside is the usual one - how many mainstream apps does Linux run? BYS