Not at all, the reason I went with NVidia is cause it offered better value and more features then ATi but certainly if I had an ATi card, I still expect it to work if I plug an Nvidia card in turn. as for your comments that competitors dont have to support their product any more if you buy their competitors product I understand your point of view but sorry I have to disagree. I am obviously not getting a refund from nvidia if i but an ATi card so how does that free them from any supportability obligations to their product? Also i disagree with your distinction between a sound card and a video card in this context for multiple reasons. Mind you, we're not saying here I want both cards running as a primary video controller, there I understand there might be conflicts, what we're saying here is the driver has to give access to its underlying hardware something that it should always do no matter what. I honestly fail to see how and why they would ever conflict but obviously i have no access to both their technical details I understand there might be something I am not thinking off and I would have no trouble waiting for them to fix any issues there might be. But flat out disable it ? I mean come on seriously, you really think that vendors have a right to refuse to support specific scenarios cause maybe it could turn out into a supportability nightmare for them? And you think thats the reasonable thing to do? and where do you draw the line? imagine buying an expensive stereo system which when you hook up doesn't work, you go back demanding they respect their warranty and they refuse on the grounds that you have put electricity through it and hey you have no idea what electricity can do to components when things go wrong, we're not gonna support that! it might turn into a nightmare! And I know its a ridiculous example but please realize this is an extension of what you're saying and is my whole point. Vendors are obliged to fix their issues (which lets not forget technically should not be there in first place but obviously nothing is perfect nor i am expecting them to be) and I dont think its fair for them to rub off responsibility simply because its not cost effective for them to fix something and even that is arguable cause doing this will loose them customers. I myself am seriously thinking of jumping ship and I bought numerous of their cards between 10 - 15. I'd say that keeping your customers happy is a very cost effective thing to do. A happy customer might stick with your product even if your competitor has an little advantage over you. an Angry one will jump ship even if you competitor lag a little bit behind. Finally I am not asking something arcane here like you seem to think. May I remind you that others do this without issue. Ever heard of a soundcard that disables things if you have other soundcards in your system? nope its normal (reminder that most boards include onboard sound which you dont need to disable before your soundcard works). same thing goes for GPUs, again plenty of motherboards have onboard gpus and again you dont need to disable that before your gpu works fully. Right now i am working on a system with multiple gpu (physical) not onboard and they both live happy together. same goes for network cards, modems and anything else i can think off. Only thing I can honestly think of that will not coexist with a competitor is a a processor and thats understandable as the they're widely different. Dont get me wrong, I understand what you're saying I understand it can be an expense for nvidia to fix their issues (are there any really? I looked around and couldnt find anyone complaining of issues when running physx along side and ATi card I would really be angry if this is exclusively a business move to blackmail their customers into staying and a pretty stupid one if so, especially if Ati gets its own physics system and it becomes widely adopted.) but lets give them the benefit of the doubt, maybe its true there are issue and maybe its a big expense to fix them and to benefit a few customers how ever it is still their responsibility to do so Vrmithrax and again I would expect no one would ever excuse a vendor of their after sales responsibility if they experience an issue on something they bought that no one else did. This is no different in my opinion.