AMD Radeon RX 6600 XT vs NVIDIA GeForce RTX 4090

Compare AMD Radeon RX 6600 XT 8 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

$ 360.99
$ 1339.00 significantly less expensive
$ 1699.99

Benchmark Score

Overall Score

General gaming and workstation score

54 %
211 %
290% significantly better overall score

Flux Core frame rate

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

111 FPS
482 FPS
370 FPS significantly higher Flux Core frame rate

Electron frame rate

Randomly generated noise sphere test

83 FPS
242 FPS
159 FPS significantly higher Electron frame rate

City frame rate

Procedurally generated city scene with voxel rendering

97 FPS
356 FPS
258 FPS significantly higher City frame rate

Clouds frame rate

Real-time noise calculation and ray marching test

47 FPS
193 FPS
147 FPS significantly higher Clouds frame rate

Free GPU Benchmark

Want to compare your graphics card against the Radeon RX 6600 XT and the GeForce RTX 4090? Download our free and quick PC Performance Test.

Other Benchmarks

3DMark Graphics score

3DMark Graphics score

High-end graphics benchmark

264% significantly higher 3DMark Graphics score
Blender score

Blender score

Cycles Render (Samples per minute)

1113% significantly higher Blender score
Geekbench 6 (OpenCL) score

Geekbench 6 (OpenCL) score

OpenCL compute benchmark

300% significantly higher Geekbench 6 (OpenCL) score
Geekbench 6 (Vulkan) score

Geekbench 6 (Vulkan) score

Vulkan compute benchmark

160% significantly higher Geekbench 6 (Vulkan) score


Core Clock Speed

Nominal chip frequency

1968 MHz
2235 MHz
13% slightly higher core clock speed

Boost Clock Speed

Higher turbo frequency when power conditions are met

2589 MHz
2% slightly higher boost clock speed
2520 MHz


Onboard memory size for textures and vertices

8 GiB
24 GiB
200% significantly more memory

Memory Bus Width

Number of parallel lines to the memory chips

128 Bit
384 Bit
200% significantly larger memory bus width


Thermal Design Power: Measure of heat generated by the GPU

160 W
181% significantly lower TDP
450 W

Pixel Rate

Number of pixels that can be rendered per second

165.7 Gigapixels/s
483.8 Gigapixels/s
191% significantly higher pixel rate

Floating Point Performance

Raw number of floating point operations per second

82.58 TFLOPS
679% significantly better floating point performance

Shading Units

Number of processors dedicated to shader processing

700% significantly more shading units

Texture Mapping Units

Number of processors dedicated to applying textures

300% significantly more texture mapping units

Render Output Processors

Number of processors dedicated to final pixel rendering

200% significantly more render output processors

Other details


Ranking in the hardwareDB database

39th of 549
2nd of 549


The product line

Radeon RX 6000 Series

Release date

The official date of release of this chip

November 2021
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 6600 XT vs GeForce RTX 4090 benchmarks

In our benchmarks, the GeForce RTX 4090 beats the Radeon RX 6600 XT in gaming performance.

Our database shows that 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. Despite this, the Radeon RX 6600 XT has a slightly higher boost clock speed. This is a frequency that can be reached if the GPU is cooled sufficiently and has enough power.

Next up, in terms of GPU memory, the GeForce RTX 4090 has significantly more memory with 24 GiB of memory compared to 8 GiB. Memory size doesn't directly affect performance, but too little memory will certainly degrade gaming performance.

In addition, the Radeon RX 6600 XT has a significantly lower TDP at 160 W when compared to the GeForce RTX 4090 at 450 W. Heat output doesn't match power consumption directly but, it's a good estimate.

In conclusion, all specs and GPU benchmarks considered, will recommend the GeForce RTX 4090 over the Radeon RX 6600 XT.


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