As mentioned earlier, I upgraded my home machine GPU to a NVidia GeForce GTX 550Ti recently. I setup a USB hard disk with Win8 and Windows To Go (WTG) and took time today to test AMP performance on this setup.
I built the Ocean simulation AMP sample available here in Release mode and launched the application. The application consistently obtained 60fps and at times more than that too. I recorded the application executing on the NVidia GPU and uploaded it to vimeo.