I have just fitted this card purchased second-hand here in NZ...and it will play COD for a while then screen goes black while game keeps playing.....grrrrrr.
My old TNT2 64mb was more reliable than this piece of crap.
I see on the net forums that this is one problematic lump of ATI rubbish.....please correct me if some of you out there can ACTUALLY use one of these ?

Did you uninstall your old video card's drivers and have you installed the very latest drivers released for the 9550?

No idea if the 9550 is prone to overheating, but keep an eye on your temperatures.

Check the Event Viewer to see if you have any errors we can go off of.

Sure did.....checked heat and was barely warm.....set an 80mm fan directed straight at it and tried again...same thing...the vid card was cold as hell.....I see that these cards can be a pain with some games......it's off to the trademe auction with the Radeon as I have picked up an FX5200 64mb for $20 and thats cheap here...
I suspect this card has been o/clocked at some point and now has a faulty chip somewhere on it....
Thanks for your help