Sapphire have shown off their 290X VAPOR-X and provided some minor details about it. One thing they are proud about is the fact that it has 8GB of GDDR5 memory. This is double the memory of the R9 290 Tri-OC card and also features a better cooling solution.
While details are still scarce we do know that it has 2 DVI, a HDMI and a DisplayPort for output. We'll be sure to keep you posted with more detailed specs as well as a price once that is known.
Thanks to videocardz.com for the pictures.