AMD Radeon RX 640 vs NVIDIA GeForce RTX 4090

Compare AMD Radeon RX 640 4 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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Specifications
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NVIDIA GeForce RTX 4090

Price

The cheapest price from our partner retailers

$ 199.99

$ 1620.00 significantly less expensive

$ 1819.99

Benchmark Score

Overall Score

General gaming and workstation score

556 points

33119 points

5856% significantly better overall score

Flux Core frame rate

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

14 FPS

787 FPS

773 FPS significantly higher Flux Core frame rate

Electron frame rate

Randomly generated noise sphere test

9 FPS

382 FPS

373 FPS significantly higher Electron frame rate

City frame rate

Procedurally generated city scene with voxel rendering

13 FPS

567 FPS

554 FPS significantly higher City frame rate

Clouds frame rate

Real-time noise calculation and ray marching test

4 FPS

318 FPS

314 FPS significantly higher Clouds frame rate

Free GPU Benchmark

Want to compare your graphics card against the Radeon RX 640 and the GeForce RTX 4090? Download our free and quick PC Performance Test.

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Other Benchmarks

Geekbench 6 (OpenCL) score

OpenCL compute benchmark

14348 points

318192 points

2117% significantly higher Geekbench 6 (OpenCL) score

Geekbench 6 (Vulkan) score

Vulkan compute benchmark

16397 points

273214 points

1566% significantly higher Geekbench 6 (Vulkan) score

Specifications

Core Clock Speed

Nominal chip frequency

1082 MHz

2235 MHz

106% significantly higher core clock speed

Boost Clock Speed

Higher turbo frequency when power conditions are met

1287 MHz

2520 MHz

95% significantly higher boost clock speed

Memory

Onboard memory size for textures and vertices

4 GiB

24 GiB

499% significantly more memory

Memory Bus Width

Number of parallel lines to the memory chips

64 Bit

384 Bit

499% significantly larger memory bus width

Memory Bandwidth

Data transfer speed between GPU core and memory

56 GB/s

1010 GB/s

1703% significantly higher memory bandwidth

TDP

Thermal Design Power: Measure of heat generated by the GPU

50 W

800% significantly lower TDP

450 W

Pixel Rate

Number of pixels that can be rendered per second

20.6 Gigapixels/s

483.8 Gigapixels/s

2248% significantly higher pixel rate

Texture Rate

Number of textured pixels that can be rendered per second

51.48 Gigatexels/s

1290 Gigatexels/s

2405% significantly higher texture rate

Texture Mapping Units

Number of processors dedicated to applying textures

512

1180% significantly more texture mapping units

Render Output Processors

Number of processors dedicated to final pixel rendering

192

1100% significantly more render output processors

Other details

Rank

Ranking in the hardwareDB database

318th of 586

2nd of 586

Family

The product line

Radeon 600 Series

Release date

The official date of release of this chip

2022 October

Memory Type

The type of memory used by this chip

GDDR5

GDDR6X

DirectX Support

Maximum version of DirectX supported

12.0

OpenGL Support

Maximum version of OpenGL supported

4.6

Radeon RX 640 vs GeForce RTX 4090 comparison

For gaming, the GeForce RTX 4090 graphics card is better than the Radeon RX 640 in our tests.

Our database shows that the GeForce RTX 4090 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 GeForce RTX 4090 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.

Next up, in terms of GPU memory, the GeForce RTX 4090 has significantly more memory with 24 GiB of memory compared to 4 GiB. Lots of memory is good when playing at high resolutions or with many monitors.

In addition, the Radeon RX 640 has a significantly lower TDP at 50 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 conclusion, all specs and GPU benchmarks considered, will recommend the GeForce RTX 4090 over the Radeon RX 640.