Gainward, introduces its Phantom series with 4GB on board memory for GeForce GTX 680 - Gainward GeForce GTX 680 Phantom 4GB. With great success of the Gainward GeForce GTX 680 Phantom and the Gainward GeForce GTX 580 Phantom 3GB, the Gainward GeForce GTX 680 Phantom 4GB brings the market the unlimited gaming gear. The most powerful GPU along with massive amount of on-board memory, powered by Gainward