Eurogamer has posted a spec analysis!
"We came away from our meeting with Alienware intrigued by what the Alpha offers. We maintain that the GPU choice limits the overall options you have with the machine - even with the Core i7 CPU in place, you'll still be getting what is (by our terms) an entry-level enthusiast performance level - but if our experience with the desktop version of the GPU tells us anything, it's that you can still get some sensational results providing you're sensible with the graphics options. We still look back at our Crysis 3 testing with the GTX 750 Ti and the £45 Pentium G3258 with some fondness: we targeted and locked at 30fps, and this freed up enough CPU and GPU time for some simply beautiful visuals, allowing us to play the game with accomplished anti-aliasing on the high preset, just one 'notch' down from the overkill very high setting that challenges even the most potent graphics card. As long as you're realistic about settings, even a relatively modest GPU can still hand in some excellent results.
But it's the chassis that's the star of the show, and a major factor in any purchasing decision. The Alpha is miniscule and discrete, comparing favourably with ultra-compact mini-ITX PCs, but with significantly more CPU and GPU horsepower under the bonnet. It's also well geared towards living room integration in a way that many PCs aren't, thanks to the inclusion of an HDMI input, presumably for set-top box passthrough. Our overall impression is that this isn't going to be the games PC for everyone, but what we've seen looks quite promising."