AMD Radeon RX 550X vs AMD Radeon RX 640

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

Benchmark Score
Other Benchmarks
Specifications
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GPU Comparison

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AMD Radeon RX 640

Price

The cheapest price from our partner retailers

$ 254.31

$ 199.99

$ 54.32 slightly less expensive

Benchmark Score

Overall Score

General gaming and workstation score

464 points

556 points

19% slightly better overall score

Flux Core frame rate

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

11 FPS

14 FPS

3 FPS slightly higher Flux Core frame rate

Electron frame rate

Randomly generated noise sphere test

8 FPS

9 FPS

1 FPS slightly higher Electron frame rate

City frame rate

Procedurally generated city scene with voxel rendering

12 FPS

13 FPS

1 FPS slightly higher City frame rate

Clouds frame rate

Real-time noise calculation and ray marching test

4 FPS

Identical

4 FPS

Free GPU Benchmark

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

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Other Benchmarks

Geekbench 5 (OpenCL) score

OpenCL compute benchmark

12373 points

15883 points

28% slightly higher Geekbench 5 (OpenCL) score

Geekbench 5 (Vulkan) score

Vulkan compute benchmark

13079 points

15859 points

21% slightly higher Geekbench 5 (Vulkan) score

Geekbench 6 (OpenCL) score

OpenCL compute benchmark

11245 points

14348 points

27% slightly higher Geekbench 6 (OpenCL) score

Geekbench 6 (Vulkan) score

Vulkan compute benchmark

12485 points

16397 points

31% slightly higher Geekbench 6 (Vulkan) score

Specifications

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

1287 MHz

Identical

1287 MHz

Memory

Onboard memory size for textures and vertices

4 GiB

Identical

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

TDP

Thermal Design Power: Measure of heat generated by the GPU

50 W

Identical

50 W

Pixel Rate

Number of pixels that can be rendered per second

20.6 Gigapixels/s

Identical

20.6 Gigapixels/s

Texture Rate

Number of textured pixels that can be rendered per second

51.48 Gigatexels/s

Identical

51.48 Gigatexels/s

Texture Mapping Units

Number of processors dedicated to applying textures

Identical

Render Output Processors

Number of processors dedicated to final pixel rendering

Identical

Other details

Rank

Ranking in the hardwareDB database

334th of 586

318th of 586

Family

The product line

Radeon RX 500X Series

Radeon 600 Series

Release date

The official date of release of this chip

2018 March

Memory Type

The type of memory used by this chip

GDDR5

DirectX Support

Maximum version of DirectX supported

12.0

OpenGL Support

Maximum version of OpenGL supported

4.6

Radeon RX 550X vs Radeon RX 640 specs and performance

For gaming, the Radeon RX 550X graphics card is better than the Radeon RX 640 in our tests.

In our comparison, the Radeon RX 550X 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.

As stated by the manufacturer, they both have the same amount of memory at 4 GiB. Lots of memory is good when playing at high resolutions or with many monitors.

In addition, both the Radeon RX 550X and the Radeon RX 640 have an identical TDP. This is not a measure of performance, but rather the amount of heat generated by the chip when running at its highest speed.

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