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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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Higher memory clock speed 1,750 MHz vs 1,625 MHz Around 10% higher memory clock speed
Lower TDP 50W vs 100W 2x lower TDP
Front view of Radeon RX 455

Reasons to consider the
AMD Radeon RX 455

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Slightly better floating-point performance 1,612.8 GFLOPS vs 1,211 GFLOPS Around 35% better floating-point performance
Slightly higher texture rate 50.4 GTexel/s vs 37.86 GTexel/s Around 35% higher texture rate
Slightly more shading units 768 vs 512 256 more shading units
Slightly more texture mapping units 48 vs 32 16 more texture mapping units
Slightly more compute units 12 vs 8 4 more compute units

Features Key features of the Radeon RX 550  vs 455 

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

Radeon RX 550
112 GB/s
Radeon RX 455
104 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 RX 455
16.8 GPixel/s

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

Radeon RX 550
37.86 GTexel/s
Radeon RX 455
50.4 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon RX 550
1,211 GFLOPS
Radeon RX 455
1,612.8 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

Specifications Full list of technical specs


Radeon RX 550  vs
GPU name Lexa Tobago
Clock speed 1,100 MHz 1,050 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 512 768
Texture mapping units 32 48
Render output processors 16 16
Compute units 8 12
Pixel rate 18.93 GPixel/s 16.8 GPixel/s
Texture rate 37.86 GTexel/s 50.4 GTexel/s
Floating-point performance 1,211 GFLOPS 1,612.8 GFLOPS


Radeon RX 550  vs
Memory clock speed 1,750 MHz 1,625 MHz
Effective memory clock speed 7,000 MHz 6,500 MHz
Memory bus 128 bit 128 bit
Memory 2,048 MB 2,048 MB
Memory type GDDR5 GDDR5
Memory bandwidth 112 GB/s 104 GB/s

noise and power

TDP 50W 100W


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