AMD Radeon RX 640 vs AMD Radeon RX 6700 XT

Compare AMD Radeon RX 640 4 GB vs AMD Radeon RX 6700 XT 12 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 6700 XT

Price

The cheapest price from our partner retailers

$ 199.99

$ 224.98 significantly less expensive

$ 424.97

Benchmark Score

Overall Score

General gaming and workstation score

556 points

7241 points

1202% significantly better overall score

Flux Core frame rate

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

14 FPS

147 FPS

134 FPS significantly higher Flux Core frame rate

Electron frame rate

Randomly generated noise sphere test

9 FPS

108 FPS

98 FPS significantly higher Electron frame rate

City frame rate

Procedurally generated city scene with voxel rendering

13 FPS

131 FPS

119 FPS significantly higher City frame rate

Clouds frame rate

Real-time noise calculation and ray marching test

4 FPS

62 FPS

58 FPS significantly higher Clouds frame rate

Free GPU Benchmark

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Other Benchmarks

Geekbench 5 (OpenCL) score

OpenCL compute benchmark

15883 points

102988 points

548% significantly higher Geekbench 5 (OpenCL) score

Geekbench 5 (Vulkan) score

Vulkan compute benchmark

15859 points

70085 points

341% significantly higher Geekbench 5 (Vulkan) score

Geekbench 6 (OpenCL) score

OpenCL compute benchmark

14348 points

100963 points

603% significantly higher Geekbench 6 (OpenCL) score

Geekbench 6 (Vulkan) score

Vulkan compute benchmark

16397 points

114437 points

597% significantly higher Geekbench 6 (Vulkan) score

Specifications

Core Clock Speed

Nominal chip frequency

1082 MHz

2321 MHz

114% significantly higher core clock speed

Boost Clock Speed

Higher turbo frequency when power conditions are met

1287 MHz

2581 MHz

100% significantly higher boost clock speed

Memory

Onboard memory size for textures and vertices

4 GiB

12 GiB

200% significantly more memory

Memory Bus Width

Number of parallel lines to the memory chips

64 Bit

192 Bit

200% significantly larger memory bus width

Memory Bandwidth

Data transfer speed between GPU core and memory

56 GB/s

384 GB/s

585% significantly higher memory bandwidth

TDP

Thermal Design Power: Measure of heat generated by the GPU

50 W

360% significantly lower TDP

230 W

Pixel Rate

Number of pixels that can be rendered per second

20.6 Gigapixels/s

165.2 Gigapixels/s

701% significantly higher pixel rate

Texture Rate

Number of textured pixels that can be rendered per second

51.48 Gigatexels/s

413 Gigatexels/s

702% significantly higher texture rate

Texture Mapping Units

Number of processors dedicated to applying textures

160

300% 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

64th of 586

Family

The product line

Radeon 600 Series

Radeon RX 6000 Series

Release date

The official date of release of this chip

2021 March

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 6700 XT specs and performance

According to the hardwareDB Benchmark, the Radeon RX 6700 XT GPU is faster than the Radeon RX 640 in gaming.

Our database shows that the Radeon RX 6700 XT 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 6700 XT also has a significantly higher boost clock speed: the maximum frequency the chip can reach if power delivery and thermals allow.

Furthermore, the spec sheet for both these GPUs show that the Radeon RX 6700 XT has significantly more memory with 12 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 6700 XT at 230 W. TDP (Thermal Design Power) measures total heat output from the chip.

In conclusion, all specs and GPU benchmarks considered, will recommend the Radeon RX 6700 XT over the Radeon RX 640.