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Differences What are the advantages of each

Front view of Radeon HD 7970M

Reasons to consider the
AMD Radeon HD 7970M

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Much higher battlefield 3 framerate 48.5 vs 21.9 Around 2.2x higher battlefield 3 framerate
Higher clock speed 850 MHz vs 715 MHz Around 20% higher clock speed
Higher effective memory clock speed 4,800 MHz vs 3,600 MHz Around 35% higher effective memory clock speed
Higher memory bandwidth 153.6 GB/s vs 115.2 GB/s Around 35% higher memory bandwidth
Higher texture rate 68 GTexel/s vs 40 GTexel/s 70% higher texture rate
Better floating-point performance 2,176 GFLOPS vs 1,601.6 GFLOPS More than 35% better floating-point performance
More texture mapping units 80 vs 56 24 more texture mapping units
Higher memory clock speed 1,200 MHz vs 900 MHz Around 35% higher memory clock speed
More compute units 20 vs 14 6 more compute units
Front view of Radeon HD 6990M

Reasons to consider the
AMD Radeon HD 6990M

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GPUBoss is not aware of any important advantages of the 6990M vs the 7970M.

Benchmarks Real world tests of Radeon HD 7970M vs 6990M

Battlefield 3

Crysis 2

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