MojoKid writes: AMD is officially launching their Radeon R7 and R9 series graphics cards today, with three new midrange to high end boards that are optimized for performance, cost and power. The Radeon R9 280X is built around AMD’s Tahiti GPU, which also powers the Radeon HD 7970. The R9 270X features the same GPU core as the Radeon HD 7870 GHz Edition and the Radeon R7 260X is powered by AMD’s Bonaire GPU, which first arrived on the Radeon HD 7790. These new cards, however, have been tweaked and enhanced in a number of ways. The Radeon R7 260X sports higher engine and memory clocks than the HD 7790 and 260X’s default memory configuration is 2GB as well. The R9 270X’s clocks have been goosed up as well with a GPU clock that peaks at 1.05GHz and its memory clock has been increased to an effective 5.6Gbps. The Radeon R9 270X offers slightly higher compute performance but much more memory bandwidth--179.2GB/s vs. 153.6GB/s to be exact. Finally, the Radeon R9 280X isn’t clocked higher than AMD’s current flagship Radeon HD 7970 GHz Edition. In fact, the R9 280X has a slightly lower peak engine clock, though memory bandwidth is similar. All told, AMD's new Radeons offer competitive performance to NVIDIA's GeForce GTX 650 Ti Boost, GeForce GTX 760 and GeForce GTX 770 cards but at significantly better price points.
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