How are you guys intending to fit these cards in your existing lap tops exactly? You have cracked Bios and will the pins be the same?
According to http://www.techinferno.com/2014/01/31/review-nvidia-gtx-880m/ its the same as the 780 but with twice as much vram. Although I don't know if I trust it. Seemingly upgrademonkey is selling the hardware on ebay... although how they got it is beyond me.