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Differences What are the advantages of each

Front view of Radeon RX 550

Reasons to consider the
AMD Radeon RX 550

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Significantly higher clock speed 1,100 MHz vs 669 MHz Around 65% higher clock speed
Much higher effective memory clock speed 7,000 MHz vs 1,656 MHz Around 4.2x higher effective memory clock speed
Better PassMark score 3,684 vs 792 Around 4.8x better PassMark score
Much higher memory clock speed 1,750 MHz vs 828 MHz More than 2x higher memory clock speed
Slightly more memory 2,048 MB vs 1,024 MB 2x more memory
Lower TDP 50W vs 140W 2.8x lower TDP
Front view of Radeon HD 3850 X2

Reasons to consider the
ATi Radeon HD 3850 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
More render output processors 32 vs 16 Twice as many render output processors
Wider memory bus 512 bit vs 128 bit 4x wider memory bus

Benchmarks Real world tests of Radeon RX 550 vs HD 3850 X2

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the Radeon RX 550  vs HD 3850 X2 

memory bandwidth Rate at which data can be read from or stored in onboard memory

Radeon RX 550
112 GB/s
Radeon HD 3850 X2
105.98 GB/s

pixel rate Number of pixels a graphics card can render to the screen every second

Radeon RX 550
18.93 GPixel/s
Radeon HD 3850 X2
21.4 GPixel/s

texture rate Speed at which a graphics card can perform texture mapping

Radeon RX 550
37.86 GTexel/s
Radeon HD 3850 X2
21.4 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon RX 550
1,211 GFLOPS
Radeon HD 3850 X2
856.4 GFLOPS

shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading

texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes

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