according to WCCFTech, who have heard via their source grapevine that Nvidia is prepping a new variant of their flagship card...an 8GB GTX 980...
http://wccftech.com/nvidia-geforce-gtx-980-8gb-gddr5-november/
http://wccftech.com/nvidia-geforce-gtx-980-8gb-gddr5-november/