AMD Radeon RX 550 vs AMD Radeon RX 640

Compare AMD Radeon RX 550 4 GB vs AMD Radeon RX 640 4 GB, specs and GPU benchmark score. Which is the better graphics card for the money?

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The cheapest price from our partner retailers

$ 279.99
$ 159.79
$ 120.20 significantly less expensive

Benchmark Score

Overall Score

General gaming and workstation score

8 %
33% slightly better overall score
6 %

Flux Core frame rate

Volumetric ray casting test, a computationally expensive method of rendering high-quality scenes

21 FPS
8 FPS significantly higher Flux Core frame rate
14 FPS

Electron frame rate

Randomly generated noise sphere test

20 FPS
11 FPS significantly higher Electron frame rate

City frame rate

Procedurally generated city scene with voxel rendering

22 FPS
10 FPS significantly higher City frame rate
12 FPS

Clouds frame rate

Real-time noise calculation and ray marching test

15 FPS
12 FPS significantly higher Clouds frame rate

Free GPU Benchmark

Want to compare your graphics card against the Radeon RX 550 and the Radeon RX 640? Download our free and quick PC Performance Test.

Other Benchmarks

Geekbench 5 (OpenCL) score

Geekbench 5 (OpenCL) score

OpenCL compute benchmark

13% slightly higher Geekbench 5 (OpenCL) score
Geekbench 5 (Vulkan) score

Geekbench 5 (Vulkan) score

Vulkan compute benchmark

0.26% slightly higher Geekbench 5 (Vulkan) score
Geekbench 6 (OpenCL) score

Geekbench 6 (OpenCL) score

OpenCL compute benchmark

27% slightly higher Geekbench 6 (OpenCL) score
Geekbench 6 (Vulkan) score

Geekbench 6 (Vulkan) score

Vulkan compute benchmark

0.26% slightly higher Geekbench 6 (Vulkan) score


Core Clock Speed

Nominal chip frequency

1100 MHz
1% slightly higher core clock speed
1082 MHz

Boost Clock Speed

Higher turbo frequency when power conditions are met

1183 MHz
1287 MHz
8% slightly higher boost clock speed


Onboard memory size for textures and vertices

4 GiB
4 GiB

Memory Bus Width

Number of parallel lines to the memory chips

128 Bit
100% significantly larger memory bus width
64 Bit

Memory Bandwidth

Data transfer speed between GPU core and memory

112 GB/s
100% significantly higher memory bandwidth
56 GB/s


Thermal Design Power: Measure of heat generated by the GPU

50 W
50 W

Pixel Rate

Number of pixels that can be rendered per second

18.93 Gigapixels/s
20.6 Gigapixels/s
8% slightly higher pixel rate

Texture Rate

Number of textured pixels that can be rendered per second

37.86 Gigatexels/s
51.48 Gigatexels/s
35% slightly higher texture rate

Texture Mapping Units

Number of processors dedicated to applying textures

25% slightly more texture mapping units

Render Output Processors

Number of processors dedicated to final pixel rendering


Other details


Ranking in the hardwareDB database

153rd of 363
180th of 363


The product line

Radeon 500 Series
Radeon 600 Series

Release date

The official date of release of this chip

April 2017

Memory Type

The type of memory used by this chip


DirectX Support

Maximum version of DirectX supported


OpenGL Support

Maximum version of OpenGL supported


Radeon RX 550 vs Radeon RX 640 benchmarks

In our benchmarks, the Radeon RX 550 beats the Radeon RX 640 in gaming performance.

The Radeon RX 550 has a slightly higher core clock speed. The core clock speed (or base speed) is the frequency at which the GPU core runs. This metric makes sense when comparing GPUs of a similar architecture or generation. Despite this, the Radeon RX 640 has a slightly higher boost clock speed. This is a frequency that can be reached if the GPU is cooled sufficiently and has enough power.

Furthermore, the spec sheet for both these GPUs show that they both have the same amount of memory at 4 GiB. Memory size doesn't directly affect performance, but too little memory will certainly degrade gaming performance.

In addition, both the Radeon RX 550 and the Radeon RX 640 have an identical TDP. TDP (Thermal Design Power) measures total heat output from the chip.

In conclusion, all specs and GPU benchmarks considered, will recommend the Radeon RX 550 over the Radeon RX 640.


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