I just ordered my MBA upgrade, with CPU, RAM and storage gimped up to the max. (2GHz i7, 8GB, 512GB storage). Custom all around so it'll roll up in two weeks or so.
I want it to be my next game box (as much of one as you can make an MBA into one. No quad-core CPU, but most games, and especially the ones I care about, are not CPU-bound anyway)
Obviously, that'll mean discrete graphics. The GMA4000 isn't a gaming GPU.
(and native windows in boot camp. Not under OSX, heaven forbid).
I've seen the current hack (Thunderbolt -> Express card) adapter -> (Express card -> PCIe) adapter, but the expresscard imposes a single PCIe lane bottleneck. That's marginally ok to game on 1920x1080, but not much beyond that.
So the questions are:
1. How much of the raw cactus ridge thunderbolt controller capability (2 channels x 2 lanes x 10GBps) is actually squeezed through that one single port? One or both channels? Tom's suggests (in the diagram at the bottom of the link) that both:
http://www.tomshardware.com/reviews/thunderbolt-performance-z77a-gd80,3205.html
That's 20GBps, or the equivalent of four PCIe 2.0 lanes (each lane is 500MBps)
2. How much of it can be taken advantage of by a 2-channel TB -> PCIe enclosure?
Sonnett has now
started selling the Eco Express
Pro which appears to do just that. But it's not certified against ANY graphics cards. They're zip-silent about GPU support while supporting everything from fiber channel to TV capture to 10GbE cards (even though graphics is where a large portion of their market lies) meaning there may be compatibility issues with it still. Whether those are something a tinkerer with a brain can work around or not is still in the air.
It's also got a 150W power limit on their enclosure, so a GPU needs to be picked carefully to work within that constraint (it's not too bad. Lots of capable GPUs fit into that bracket).
Thoughts anyone?