NVIDIA GeForce GTX 660 vs AMD Radeon RX 6400

Compare NVIDIA GeForce GTX 660 3 GB vs AMD Radeon RX 6400 4 GB, specs and GPU benchmark score. Which is the better graphics card for the money?

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Benchmark Score

Overall Score

General gaming and workstation score

816 points

1845 points

126% significantly better overall score

Flux Core frame rate

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

18 FPS

42 FPS

24 FPS significantly higher Flux Core frame rate

Electron frame rate

Randomly generated noise sphere test

11 FPS

28 FPS

17 FPS significantly higher Electron frame rate

City frame rate

Procedurally generated city scene with voxel rendering

13 FPS

36 FPS

24 FPS significantly higher City frame rate

Clouds frame rate

Real-time noise calculation and ray marching test

9 FPS

16 FPS

7 FPS significantly higher Clouds frame rate

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Other Benchmarks

3DMark Graphics score

High-end graphics benchmark

1317 points

712% significantly higher 3DMark Graphics score

162 points

Blender score

Cycles Render (Samples per minute)

122.56 points

302.98 points

147% significantly higher Blender score

Geekbench 6 (OpenCL) score

OpenCL compute benchmark

11353 points

33586 points

195% significantly higher Geekbench 6 (OpenCL) score

Geekbench 6 (Vulkan) score

Vulkan compute benchmark

11858 points

41105 points

246% significantly higher Geekbench 6 (Vulkan) score

Specifications

Core Clock Speed

Nominal chip frequency

980 MHz

1923 MHz

96% significantly higher core clock speed

Boost Clock Speed

Higher turbo frequency when power conditions are met

1032 MHz

2321 MHz

124% significantly higher boost clock speed

Memory

Onboard memory size for textures and vertices

3 GiB

4 GiB

33% slightly more memory

Memory Bus Width

Number of parallel lines to the memory chips

192 Bit

200% significantly larger memory bus width

64 Bit

Memory Bandwidth

Data transfer speed between GPU core and memory

144.2 GB/s

12% slightly higher memory bandwidth

128 GB/s

TDP

Thermal Design Power: Measure of heat generated by the GPU

140 W

53 W

164% significantly lower TDP

Pixel Rate

Number of pixels that can be rendered per second

20.64 Gigapixels/s

74.3 Gigapixels/s

259% significantly higher pixel rate

Texture Rate

Number of textured pixels that can be rendered per second

82.56 Gigatexels/s

111.4 Gigatexels/s

34% slightly higher texture rate

Floating Point Performance

Raw number of floating point operations per second

1.98 TFLOPS

3.57 TFLOPS

80% significantly better floating point performance

Shading Units

Number of processors dedicated to shader processing

960

25% slightly more shading units

768

Texture Mapping Units

Number of processors dedicated to applying textures

66% significantly more texture mapping units

Render Output Processors

Number of processors dedicated to final pixel rendering

33% slightly more render output processors

Other details

Rank

Ranking in the hardwareDB database

278th of 586

217th of 586

Family

The product line

Radeon RX 6000 Series

Release date

The official date of release of this chip

2022 January

Memory Type

The type of memory used by this chip

GDDR5

GDDR6

DirectX Support

Maximum version of DirectX supported

11.0

12.0

OpenGL Support

Maximum version of OpenGL supported

4.5

4.6

GeForce GTX 660 vs Radeon RX 6400 specs and performance

In our benchmarks, the Radeon RX 6400 beats the GeForce GTX 660 in gaming performance.

Our database shows that the Radeon RX 6400 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 6400 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 6400 has slightly more memory with 4 GiB of memory compared to 3 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 6400 has a significantly lower TDP at 53 W when compared to the GeForce GTX 660 at 140 W. Heat output doesn't match power consumption directly but, it's a good estimate.

In terms of raw gaming performance in our GPU benchmark, the Radeon RX 6400 is better than the GeForce GTX 660.