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Differences What are the advantages of each

Front view of Radeon HD 8790M

Reasons to consider the
AMD Radeon HD 8790M

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Higher effective memory clock speed 4,000 MHz vs 1,800 MHz Around 2.2x higher effective memory clock speed
Higher memory bandwidth 64 GB/s vs 14.4 GB/s Around 4.5x higher memory bandwidth
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
Higher memory clock speed 1,000 MHz vs 900 MHz More than 10% higher memory clock speed
Front view of GeForce 945A

Reasons to consider the
Nvidia GeForce 945A

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Higher clock speed 1,072 MHz vs 850 MHz More than 25% higher clock speed
Significantly higher turbo clock speed 1,176 MHz vs 900 MHz More than 30% higher turbo clock speed

Benchmarks Real world tests of Radeon HD 8790M vs GeForce 945A

Bitcoin mining Data courtesy CompuBench

Radeon HD 8790M
80.42 mHash/s
GeForce 945A
107.63 mHash/s

Face detection Data courtesy CompuBench

Radeon HD 8790M
12.76 mPixels/s
GeForce 945A
28.87 mPixels/s

Ocean surface simulation Data courtesy CompuBench

Radeon HD 8790M
465.63 frames/s
GeForce 945A
381.9 frames/s

Particle simulation Data courtesy CompuBench

Radeon HD 8790M
162.83 mInteraction/s
GeForce 945A
316.59 mInteraction/s

T-Rex (Compubench 1.5) Data courtesy CompuBench

Radeon HD 8790M
1.58 frames/s
GeForce 945A
1.99 frames/s

Video composition Data courtesy CompuBench

Radeon HD 8790M
28.84 frames/s
GeForce 945A
30.79 frames/s

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