You probably think that you've already seen all there is to see about AMD Radeon HD 7870 graphics cards, but the Radeon HD 7870 jokerCard 2 GB that Club 3D recently launched is something special indeed. That's because this video card isn't based on the Pitcairn GPU like the other 7870 cards, but instead the Tahiti chip that's traditionally been used for the high-end Radeon HD 7950 and 7970. That makes the 7870 jokerCard faster but not more expensive than the standard HD 7870. The Pitcairn GPU that's normally the foundation of the Radeon HD 7870 cards has 1280 shader units and a 256 bit memory bus. That GPU is made with 28nm transistors, and has about 2.8 billion of them. The Tahiti GPU in the 7950 and 7970 cards have 2048 shader units and a 384-bit memory bus, and with 4.3 billion transistors this GPU is definitely more powerful.
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