Sorry must be getting mixed up with another PC.
Just checked the PC and it is running a single core 3.2GHz (64bit) prescott processor.
Schematics here.
I did a lot of research looking for the best motherboard/processor for a PC that needed ISA support and at about £40 (used) this was the one I chose.
Running windows Vista it works great with my ISA hardware and runs all my other "workshop" applications easily.
Before finding this board I was looking at a Poweredge 1300 server as the best affordable option!
There are better "industrial" solutions available, but the cost is in the hundreds if not more!
peter