The PC is struggling a little, but I am not completely sure it's the result of hardware, rather a software fault. It's a 2.4gHz P4, 500mb ram. I'm considering upping the RAM to 1.5gig just in case it helps.
I watch task manager a lot, becuase data transmission via the LPT port consumes 100% CPU when active that I need to be wary of it. Having TheSky connected via ASCOM rather than it's other LX200 driver (propriatory I presume - to TheSky), definitely consumes significant CPU, but does not max it out at 100% constantly like it's in an infinate loop or anything.
I guess something I haven't tried doing is connecting TheSky to the scope using ASCOM and not the Hub. I'll have to try that.
I am actually a member of that ASCOM group but completely forgot about it, thanks for the reminder, I might re-visit the site when I have done some more testing.
Good to know it isn't slow on someone else's machine (although the spec's are a little superior to mine

)
I am using the TeleAPI.