Honestly when I saw this yesterday I thought it was an April Fools joke, but apparently it is not. ASUS will be releasing a GeForce GTX 790 Turbo in white. From the rendering it does not look like the card will have a white PCB, but it will have a white cooler shroud with red accents. We can also see the card is using a blower-type cooler.
The card will likely have a modified PCB and we can see two DVI, HDMI and DisplayPort connectors. ASUS teased this card on their PCDIY page, saying more information would be coming soon.
Even with the memory allocation issue on the GTX 970 it is still a great card, especially considering there is no competition from AMD.