Once again, thanks to all for your invaluable help.

My addiction is growing :-)

I think I want to trade in my boat on Georgian Bay for a sub.

Cheers,
Dave.

Woa.. The 1950 was over-heating? That thing has a very nice two speed fan in it. Give it more room to breath out the back and maybe add a side fan blowin on its intake so it's not totally depandant on already heated case air.
-Pv-

Those Ati cards run very hot you know. I haven't checked how far SH4 takes them, but with Armed Assault I've seen my dual X1950 Pros top out at 96 degrees celsius without any stability problems. Yes, I have a better case ventilation now :)

My bet is the CTDs were related to running out of memory, since SH4 uses lots of it(both graphics and "normal" ram), and I've experienced similar problems myself. If the problems were due to heat, then most likely you would see all kinds of weird things on the screen before the system would lock completely, not just ctd.