Tony D,
Found this little gem ( or an earlier version) a couple of years ago.
PC Wizard 2009 - Download
PC Wizard, finds and reports every detail you ever wanted to know (and some you didn't) about every device in, or hung off, your computer, what's driving it, how well and fast it's working etc. Worth it's weight in brussel sprouts, it is.
Is now a permanent resident on my computers, and on CD to load into any computer I intend to poke around in.
RiscOS