Yeah, people seem to forget those mining GPUs that were released specifically to prevent their resale in the aftermaket gaming community that people still managed to get to output video _despite the cards lacking physical ports_. They did it with a modded driver.
Sort of. It's the exact same thing as Nvidia optimus. Linux calls it DRI-PRIME or PRIME offload. Get it =P ?
Big, display-less GPU renders frame, image is copied into VRAM of smaller GPU with a display. Smaller GPU draws image to screen.
Most of the gamer laptops do this. There's no physical link between the display and the big GPU. I believe the mobile cards enable a second DMA engine that is usually soft locked on GeForce to handle the transfer.
Tomb Raider running 1024x768 30FPS on a card half the cost of 3Dfx Voodoo1 https://www.youtube.com/watch?v=5GMesT4WKzI
It could even run up to 60FPS at 640x480, the best hardware platform running Tomb Raider, and only one allowing over 30FPS.
They basically render frames on the video port-less GPU, and then pass them over to a second GPU for actual output. So probably quite similar to what Looking Glass is doing.
