AMD Radeon RX 6900 XT vs NVIDIA GeForce RTX 4090

Compare AMD Radeon RX 6900 XT 16 GB vs NVIDIA GeForce RTX 4090 24 GB, specs and GPU benchmark score. Which is the better graphics card for the money?

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The cheapest price from our partner retailers

$ 630.79
$ 1069.20 significantly less expensive
$ 1699.99

Benchmark Score

Overall Score

General gaming and workstation score

140 %
211 %
50% significantly better overall score

Flux Core frame rate

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

281 FPS
482 FPS
201 FPS significantly higher Flux Core frame rate

Electron frame rate

Randomly generated noise sphere test

208 FPS
242 FPS
33 FPS slightly higher Electron frame rate

City frame rate

Procedurally generated city scene with voxel rendering

252 FPS
356 FPS
104 FPS significantly higher City frame rate

Clouds frame rate

Real-time noise calculation and ray marching test

121 FPS
193 FPS
72 FPS significantly higher Clouds frame rate

Free GPU Benchmark

Want to compare your graphics card against the Radeon RX 6900 XT and the GeForce RTX 4090? Download our free and quick PC Performance Test.

Other Benchmarks

Blender score

Blender score

Cycles Render (Samples per minute)

490% significantly higher Blender score
Geekbench 6 (OpenCL) score

Geekbench 6 (OpenCL) score

OpenCL compute benchmark

103% significantly higher Geekbench 6 (OpenCL) score
Geekbench 6 (Vulkan) score

Geekbench 6 (Vulkan) score

Vulkan compute benchmark

51% significantly higher Geekbench 6 (Vulkan) score


Core Clock Speed

Nominal chip frequency

1825 MHz
2235 MHz
22% slightly higher core clock speed

Boost Clock Speed

Higher turbo frequency when power conditions are met

2250 MHz
2520 MHz
11% slightly higher boost clock speed


Onboard memory size for textures and vertices

16 GiB
24 GiB
49% significantly more memory

Memory Bus Width

Number of parallel lines to the memory chips

256 Bit
384 Bit
49% significantly larger memory bus width


Thermal Design Power: Measure of heat generated by the GPU

300 W
49% significantly lower TDP
450 W

Pixel Rate

Number of pixels that can be rendered per second

288 Gigapixels/s
483.8 Gigapixels/s
67% significantly higher pixel rate

Floating Point Performance

Raw number of floating point operations per second

23.04 TFLOPS
82.58 TFLOPS
258% significantly better floating point performance

Shading Units

Number of processors dedicated to shader processing

220% significantly more shading units

Texture Mapping Units

Number of processors dedicated to applying textures

60% significantly more texture mapping units

Render Output Processors

Number of processors dedicated to final pixel rendering

49% significantly more render output processors

Other details


Ranking in the hardwareDB database

7th of 549
2nd of 549


The product line

Radeon RX 6000 Series

Release date

The official date of release of this chip

August 2020
October 2022

Memory Type

The type of memory used by this chip


DirectX Support

Maximum version of DirectX supported


OpenGL Support

Maximum version of OpenGL supported


Radeon RX 6900 XT vs GeForce RTX 4090 specs and performance

According to the hardwareDB Benchmark, the GeForce RTX 4090 GPU is faster than the Radeon RX 6900 XT in gaming.

The GeForce RTX 4090 has a slightly 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 GeForce RTX 4090 also has a slightly higher boost clock speed: the maximum frequency the chip can reach if power delivery and thermals allow.

As stated by the manufacturer, the GeForce RTX 4090 has significantly more memory with 24 GiB of memory compared to 16 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 6900 XT has a significantly lower TDP at 300 W when compared to the GeForce RTX 4090 at 450 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 GeForce RTX 4090 is better than the Radeon RX 6900 XT.


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