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Differences What are the advantages of each

Front view of Radeon R5 M420

Reasons to consider the
AMD Radeon R5 M420

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More memory 4,096 MB vs 2,048 MB 2x more memory
Front view of GeForce GTX 660M

Reasons to consider the
Nvidia GeForce GTX 660M

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Higher effective memory clock speed 4,000 MHz vs 2,000 MHz 2x higher effective memory clock speed
Higher memory bandwidth 64 GB/s vs 16 GB/s 4x higher memory bandwidth
Much better manhattan score 3,709.34 vs 1,808.42 More than 2x better manhattan score
Slightly higher clock speed 835 MHz vs 780 MHz More than 5% higher clock speed
Higher turbo clock speed 950 MHz vs 855 MHz More than 10% higher turbo clock speed
More render output processors 16 vs 8 Twice as many render output processors
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
Slightly more texture mapping units 32 vs 20 12 more texture mapping units

Benchmarks Real world tests of Radeon R5 M420 vs GeForce GTX 660M

T-Rex (GFXBench 3.0) Data courtesy CompuBench

Radeon R5 M420
GeForce GTX 660M

Manhattan (GFXBench 3.0) Data courtesy CompuBench

Radeon R5 M420
GeForce GTX 660M

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