I don't mean to be blunt but what are you talking about? What problems did you mean?I'm going to take a guess and say no. The Windows PC market has a few Express-Card units that do basic stuff but aren't readily available. Most online retailers don't stock them since it doesn't sell.
For Apple, I'd be suspicious about how reliably it would perform, they can't seem to get their IGP/GPU equipped MBP's to work properly, so I have my doubts that it can properly manage one that's connected to the TBolt port without major problems.
OSX seems to activate to the discrete GPU even for menial tasks. That's the complaint most people have. There are also many issues with switching graphics with certain apps although that is mainly an incompatibility with 3rd party apps so I don't think its Apple's fault.I don't mean to be blunt but what are you talking about? What problems did you mean?
I've posted many threads on Apple's discussion forums trying to find a solution to the issues. In the end I took the units to the nearest Apple store to have them work on them since they were merely months old. 1 unit had to be swapped, the others were refunded for different models.I don't know your experience both personally or with clients, but I would have to say on the whole you are mistaken. If the standard were that these dual graphic boards were failing as frequently as you suggest, there would be some form of recall, I would suspect.
That said, I have owned two macbook pros and never had a graphics related issue.
I am confused, you cited black screens and kernel panics, but those issues are not solely due to IGP or GPUs. Do you have any sort of data to back up your claim, or is it just personal experience? I only ask because from my personal experience, I have yet to meet an individual who has had a GPU related hardware failure. Does that mean they don't exist? No. It means my sample exposure is the complete other side of the spectrum.
If you have any data on the dual graphics boards stating that their chance of failure is as high as you suggest, I would genuinely be interested in reading it.
Finally some sense. An external graphics card via Thunderbolt is going to be expensive. And who's going to provide drivers for it? And the external graphic card isn't going to help the built in display on a laptop - it would drive an external display.You can have an external graphics card for your current mbp if you're willing to spend $650 (including a midrange card).
For $100 more you can get a highly capable gaming pc.
External graphics for laptops are just pointless, get the right machine for the job in the first place.