AMD Radeon RX 640 vs AMD Radeon RX 6800

Compare AMD Radeon RX 640 4 GB vs AMD Radeon RX 6800 16 GB, specs and GPU benchmark score. Which is the better graphics card for the money?

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Specifications
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AMD Radeon RX 6800

Price

The cheapest price from our partner retailers

$ 199.99

$ 319.01 significantly less expensive

$ 519.00

Benchmark Score

Overall Score

General gaming and workstation score

556 points

9568 points

1620% significantly better overall score

Flux Core frame rate

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

14 FPS

196 FPS

182 FPS significantly higher Flux Core frame rate

Electron frame rate

Randomly generated noise sphere test

9 FPS

143 FPS

134 FPS significantly higher Electron frame rate

City frame rate

Procedurally generated city scene with voxel rendering

13 FPS

173 FPS

160 FPS significantly higher City frame rate

Clouds frame rate

Real-time noise calculation and ray marching test

4 FPS

83 FPS

79 FPS significantly higher Clouds frame rate

Free GPU Benchmark

Want to compare your graphics card against the Radeon RX 640 and the Radeon RX 6800? Download our free and quick PC Performance Test.

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Other Benchmarks

Geekbench 5 (OpenCL) score

OpenCL compute benchmark

15883 points

130322 points

720% significantly higher Geekbench 5 (OpenCL) score

Geekbench 5 (Vulkan) score

Vulkan compute benchmark

15859 points

93163 points

487% significantly higher Geekbench 5 (Vulkan) score

Geekbench 6 (OpenCL) score

OpenCL compute benchmark

14348 points

130005 points

806% significantly higher Geekbench 6 (OpenCL) score

Geekbench 6 (Vulkan) score

Vulkan compute benchmark

16397 points

133046 points

711% significantly higher Geekbench 6 (Vulkan) score

Specifications

Core Clock Speed

Nominal chip frequency

1082 MHz

1815 MHz

67% significantly higher core clock speed

Boost Clock Speed

Higher turbo frequency when power conditions are met

1287 MHz

2105 MHz

63% significantly higher boost clock speed

Memory

Onboard memory size for textures and vertices

4 GiB

16 GiB

300% significantly more memory

Memory Bus Width

Number of parallel lines to the memory chips

64 Bit

256 Bit

300% significantly larger memory bus width

Memory Bandwidth

Data transfer speed between GPU core and memory

56 GB/s

512 GB/s

814% significantly higher memory bandwidth

TDP

Thermal Design Power: Measure of heat generated by the GPU

50 W

400% significantly lower TDP

250 W

Pixel Rate

Number of pixels that can be rendered per second

20.6 Gigapixels/s

202.1 Gigapixels/s

881% significantly higher pixel rate

Texture Rate

Number of textured pixels that can be rendered per second

51.48 Gigatexels/s

505.2 Gigatexels/s

881% significantly higher texture rate

Texture Mapping Units

Number of processors dedicated to applying textures

240

499% significantly more texture mapping units

Render Output Processors

Number of processors dedicated to final pixel rendering

499% significantly more render output processors

Other details

Rank

Ranking in the hardwareDB database

318th of 586

41st of 586

Family

The product line

Radeon 600 Series

Radeon RX 6000 Series

Release date

The official date of release of this chip

2020 November

Memory Type

The type of memory used by this chip

GDDR5

GDDR6

DirectX Support

Maximum version of DirectX supported

12.0

OpenGL Support

Maximum version of OpenGL supported

4.6

Radeon RX 640 vs Radeon RX 6800 comparison

In our benchmarks, the Radeon RX 6800 beats the Radeon RX 640 in gaming performance.

Our database shows that the Radeon RX 6800 has a significantly 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. In addition, the Radeon RX 6800 also has a significantly higher boost clock speed. The boost clock speed is the frequency that the GPU core can reach if the temperature is low enough. The allows for higher performance in certain scenarios.

As stated by the manufacturer, the Radeon RX 6800 has significantly more memory with 16 GiB of memory compared to 4 GiB. If you're planning at playing games at high resolutions with high-quality textures, you will need a lot of memory.

In addition, the Radeon RX 640 has a significantly lower TDP at 50 W when compared to the Radeon RX 6800 at 250 W. Heat output doesn't match power consumption directly but, it's a good estimate.

According to the results of the hardwareDB benchmark utility, the Radeon RX 6800 is faster than the Radeon RX 640.