AMD Radeon RX 640 vs AMD Radeon RX 6600

Compare AMD Radeon RX 640 4 GB vs AMD Radeon RX 6600 8 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 6600

Price

The cheapest price from our partner retailers

$ 199.99

$ 0.89 slightly less expensive

$ 200.88

Benchmark Score

Overall Score

General gaming and workstation score

556 points

4302 points

673% significantly better overall score

Flux Core frame rate

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

14 FPS

86 FPS

73 FPS significantly higher Flux Core frame rate

Electron frame rate

Randomly generated noise sphere test

9 FPS

65 FPS

55 FPS significantly higher Electron frame rate

City frame rate

Procedurally generated city scene with voxel rendering

13 FPS

78 FPS

65 FPS significantly higher City frame rate

Clouds frame rate

Real-time noise calculation and ray marching test

4 FPS

37 FPS

33 FPS significantly higher Clouds frame rate

Free GPU Benchmark

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Other Benchmarks

Geekbench 5 (OpenCL) score

OpenCL compute benchmark

15883 points

76157 points

379% significantly higher Geekbench 5 (OpenCL) score

Geekbench 5 (Vulkan) score

Vulkan compute benchmark

15859 points

61842 points

289% significantly higher Geekbench 5 (Vulkan) score

Geekbench 6 (OpenCL) score

OpenCL compute benchmark

14348 points

73158 points

409% significantly higher Geekbench 6 (OpenCL) score

Geekbench 6 (Vulkan) score

Vulkan compute benchmark

16397 points

86589 points

428% significantly higher Geekbench 6 (Vulkan) score

Specifications

Core Clock Speed

Nominal chip frequency

1082 MHz

1626 MHz

50% significantly higher core clock speed

Boost Clock Speed

Higher turbo frequency when power conditions are met

1287 MHz

2491 MHz

93% significantly higher boost clock speed

Memory

Onboard memory size for textures and vertices

4 GiB

8 GiB

100% significantly more memory

Memory Bus Width

Number of parallel lines to the memory chips

64 Bit

128 Bit

100% significantly larger memory bus width

Memory Bandwidth

Data transfer speed between GPU core and memory

56 GB/s

224 GB/s

300% significantly higher memory bandwidth

TDP

Thermal Design Power: Measure of heat generated by the GPU

50 W

163% significantly lower TDP

132 W

Pixel Rate

Number of pixels that can be rendered per second

20.6 Gigapixels/s

159.4 Gigapixels/s

673% significantly higher pixel rate

Texture Rate

Number of textured pixels that can be rendered per second

51.48 Gigatexels/s

279 Gigatexels/s

441% significantly higher texture rate

Texture Mapping Units

Number of processors dedicated to applying textures

112

180% significantly more texture mapping units

Render Output Processors

Number of processors dedicated to final pixel rendering

300% significantly more render output processors

Other details

Rank

Ranking in the hardwareDB database

318th of 586

118th of 586

Family

The product line

Radeon 600 Series

Radeon RX 6000 Series

Release date

The official date of release of this chip

2021 October

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 6600 benchmarks

In our benchmarks, the Radeon RX 6600 beats the Radeon RX 640 in gaming performance.

Our database shows that the Radeon RX 6600 has a significantly higher core clock speed. This is the frequency at which the graphics core is running at. While not necessarily an indicator of overall performance, this metric can be useful when comparing two GPUs based on the same architecture. In addition, the Radeon RX 6600 also has a significantly higher boost clock speed: the maximum frequency the chip can reach if power delivery and thermals allow.

As stated by the manufacturer, the Radeon RX 6600 has significantly more memory with 8 GiB of memory compared to 4 GiB. Memory size doesn't directly affect performance, but too little memory will certainly degrade gaming performance.

In addition, the Radeon RX 640 has a significantly lower TDP at 50 W when compared to the Radeon RX 6600 at 132 W. TDP (Thermal Design Power) measures total heat output from the chip.

In terms of raw gaming performance in our GPU benchmark, the Radeon RX 6600 is better than the Radeon RX 640.