Given that many others are reporting that they can play games at resolutions that crash my card, and I've upgraded my PSU to the Corsair HX520W which should be more than sufficient to run the card, I've requested an RMA replacement of my AGP HIS X1950 256MB Pro ICEQ3 Turbo from Overclockers.co.uk - but right now they show none in stock
So if I get a replacement that works then my vote will be "unstable".