Sapphire's latest release in their Dual-X range of cards sees a tidy increase to the Radeon R9 270Xs memory. This brings it to 4GB and makes it meet the recommended system requirements for Battlefield 4. The 4GB of GDDR5 is clocked at 5.6 GHz across a 256-bit memory interface which means it can produce 179GB/s of bandwidth.
The card has Sapphire's Dual-X cooling attached to a non reference PCB. Dual-X has been fitted to a number of cards in the past and performs very well. The R9 270X Dual-X 4 GB is currently only in the greater China region with no word as to pricing in Western markets. However, it is thought to be $30 to $50 over the price of the reference card which retails for around $199.
We'll be sure to keep you posted with any new information.