AMD Radeon RX 6800 XT vs NVIDIA GeForce GTX 660

Compare AMD Radeon RX 6800 XT 16 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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Benchmark Score

Overall Score

General gaming and workstation score

11265 points

1280% significantly better overall score

816 points

Flux Core frame rate

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

231 FPS

212 FPS significantly higher Flux Core frame rate

18 FPS

Electron frame rate

Randomly generated noise sphere test

167 FPS

156 FPS significantly higher Electron frame rate

11 FPS

City frame rate

Procedurally generated city scene with voxel rendering

204 FPS

191 FPS significantly higher City frame rate

13 FPS

Clouds frame rate

Real-time noise calculation and ray marching test

97 FPS

88 FPS significantly higher Clouds frame rate

9 FPS

Free GPU Benchmark

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Other Benchmarks

3DMark Graphics score

High-end graphics benchmark

19436 points

1375% significantly higher 3DMark Graphics score

1317 points

Blender score

Cycles Render (Samples per minute)

2414.65 points

1870% significantly higher Blender score

122.56 points

Geekbench 5 (Metal) score

Metal compute benchmark

150488 points

2661% significantly higher Geekbench 5 (Metal) score

5449 points

Geekbench 5 (OpenCL) score

OpenCL compute benchmark

157812 points

1286% significantly higher Geekbench 5 (OpenCL) score

11381 points

Geekbench 5 (Vulkan) score

Vulkan compute benchmark

100571 points

840% significantly higher Geekbench 5 (Vulkan) score

10693 points

Geekbench 6 (Metal) score

Metal compute benchmark

200077 points

4541% significantly higher Geekbench 6 (Metal) score

4311 points

Geekbench 6 (OpenCL) score

OpenCL compute benchmark

154801 points

1263% significantly higher Geekbench 6 (OpenCL) score

11353 points

Geekbench 6 (Vulkan) score

Vulkan compute benchmark

157877 points

1231% significantly higher Geekbench 6 (Vulkan) score

11858 points

Specifications

Core Clock Speed

Nominal chip frequency

2015 MHz

105% significantly higher core clock speed

980 MHz

Boost Clock Speed

Higher turbo frequency when power conditions are met

2250 MHz

118% significantly higher boost clock speed

1032 MHz

Memory

Onboard memory size for textures and vertices

16 GiB

433% significantly more memory

3 GiB

Memory Bus Width

Number of parallel lines to the memory chips

256 Bit

33% slightly larger memory bus width

192 Bit

Memory Bandwidth

Data transfer speed between GPU core and memory

512 GB/s

255% significantly higher memory bandwidth

144.2 GB/s

TDP

Thermal Design Power: Measure of heat generated by the GPU

300 W

140 W

114% significantly lower TDP

Pixel Rate

Number of pixels that can be rendered per second

288 Gigapixels/s

1295% significantly higher pixel rate

20.64 Gigapixels/s

Texture Rate

Number of textured pixels that can be rendered per second

648 Gigatexels/s

684% significantly higher texture rate

82.56 Gigatexels/s

Floating Point Performance

Raw number of floating point operations per second

20.74 TFLOPS

946% significantly better floating point performance

1.98 TFLOPS

Shading Units

Number of processors dedicated to shader processing

4608

380% significantly more shading units

960

Texture Mapping Units

Number of processors dedicated to applying textures

288

259% significantly more texture mapping units

Render Output Processors

Number of processors dedicated to final pixel rendering

128

433% significantly more render output processors

Other details

Rank

Ranking in the hardwareDB database

33rd of 586

277th of 586

Family

The product line

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

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 6800 XT vs GeForce GTX 660 specs and performance

According to the hardwareDB Benchmark, the Radeon RX 6800 XT GPU is faster than the GeForce GTX 660 in gaming.

In our comparison, the Radeon RX 6800 XT 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 6800 XT also has a significantly higher boost clock speed: the maximum frequency the chip can reach if power delivery and thermals allow.

Next up, in terms of GPU memory, the Radeon RX 6800 XT has significantly more memory with 16 GiB of memory compared to 3 GiB. Lots of memory is good when playing at high resolutions or with many monitors.

In addition, the GeForce GTX 660 has a significantly lower TDP at 140 W when compared to the Radeon RX 6800 XT at 300 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 terms of raw gaming performance in our GPU benchmark, the Radeon RX 6800 XT is better than the GeForce GTX 660.