AMD Radeon RX 6600 vs NVIDIA GeForce GTX 660

Compare AMD Radeon RX 6600 8 GB vs NVIDIA GeForce GTX 660 3 GB, specs and GPU benchmark score. Which is the better graphics card for the money?

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GPU Comparison

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Benchmark Score

Overall Score

General gaming and workstation score

4302 points

427% significantly better overall score

816 points

Flux Core frame rate

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

86 FPS

68 FPS significantly higher Flux Core frame rate

18 FPS

Electron frame rate

Randomly generated noise sphere test

65 FPS

54 FPS significantly higher Electron frame rate

11 FPS

City frame rate

Procedurally generated city scene with voxel rendering

78 FPS

65 FPS significantly higher City frame rate

13 FPS

Clouds frame rate

Real-time noise calculation and ray marching test

37 FPS

27 FPS significantly higher Clouds frame rate

9 FPS

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Other Benchmarks

3DMark Graphics score

High-end graphics benchmark

8131 points

517% significantly higher 3DMark Graphics score

1317 points

Blender score

Cycles Render (Samples per minute)

969.87 points

691% significantly higher Blender score

122.56 points

Geekbench 5 (Metal) score

Metal compute benchmark

75685 points

1288% significantly higher Geekbench 5 (Metal) score

5449 points

Geekbench 5 (OpenCL) score

OpenCL compute benchmark

76157 points

569% significantly higher Geekbench 5 (OpenCL) score

11381 points

Geekbench 5 (Vulkan) score

Vulkan compute benchmark

61842 points

478% significantly higher Geekbench 5 (Vulkan) score

10693 points

Geekbench 6 (Metal) score

Metal compute benchmark

100044 points

2220% significantly higher Geekbench 6 (Metal) score

4311 points

Geekbench 6 (OpenCL) score

OpenCL compute benchmark

73158 points

544% significantly higher Geekbench 6 (OpenCL) score

11353 points

Geekbench 6 (Vulkan) score

Vulkan compute benchmark

86589 points

630% significantly higher Geekbench 6 (Vulkan) score

11858 points

Specifications

Core Clock Speed

Nominal chip frequency

1626 MHz

65% significantly higher core clock speed

980 MHz

Boost Clock Speed

Higher turbo frequency when power conditions are met

2491 MHz

141% significantly higher boost clock speed

1032 MHz

Memory

Onboard memory size for textures and vertices

8 GiB

166% significantly more memory

3 GiB

Memory Bus Width

Number of parallel lines to the memory chips

128 Bit

192 Bit

49% significantly larger memory bus width

Memory Bandwidth

Data transfer speed between GPU core and memory

224 GB/s

55% significantly higher memory bandwidth

144.2 GB/s

TDP

Thermal Design Power: Measure of heat generated by the GPU

132 W

6% slightly lower TDP

140 W

Pixel Rate

Number of pixels that can be rendered per second

159.4 Gigapixels/s

672% significantly higher pixel rate

20.64 Gigapixels/s

Texture Rate

Number of textured pixels that can be rendered per second

279 Gigatexels/s

237% significantly higher texture rate

82.56 Gigatexels/s

Floating Point Performance

Raw number of floating point operations per second

8.93 TFLOPS

350% significantly better floating point performance

1.98 TFLOPS

Shading Units

Number of processors dedicated to shader processing

1792

86% significantly more shading units

960

Texture Mapping Units

Number of processors dedicated to applying textures

112

40% slightly more texture mapping units

Render Output Processors

Number of processors dedicated to final pixel rendering

166% significantly more render output processors

Other details

Rank

Ranking in the hardwareDB database

117th of 586

276th of 586

Family

The product line

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

GDDR6

GDDR5

DirectX Support

Maximum version of DirectX supported

12.0

11.0

OpenGL Support

Maximum version of OpenGL supported

4.6

4.5

Radeon RX 6600 vs GeForce GTX 660 benchmarks

For gaming, the Radeon RX 6600 graphics card is better than the GeForce GTX 660 in our tests.

Our database shows that the Radeon RX 6600 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 6600 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.

Furthermore, the spec sheet for both these GPUs show that the Radeon RX 6600 has significantly more memory with 8 GiB of memory compared to 3 GiB. Lots of memory is good when playing at high resolutions or with many monitors.

In addition, the Radeon RX 6600 has a slightly lower TDP at 132 W when compared to the GeForce GTX 660 at 140 W. 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 6600 over the GeForce GTX 660.