AMD Radeon RX 640

AMD Radeon RX 640 Benchmark

AMD Radeon RX 640 GPU benchmark and specs - 4 GB AMD Radeon 600 Series Graphics card rating. How good is the Radeon RX 640 for gaming?

GPU Benchmark Score

10 %
Bad score from 3 samples
Medium uncertainty

Ranked 249th out of 526 in the GPU Database. Tests performed at 1920 x 1080 resolution.

Benchmark Average 10% Low 1% Low
Flux Core
Volumetric ray casting test, a computationally expensive method of rendering high-quality scenes
14 FPS 8 FPS 5 FPS
Randomly generated noise sphere test
10 FPS 7 FPS 3 FPS
Procedurally generated city scene with voxel rendering
13 FPS 10 FPS 6 FPS
Real-time noise calculation and ray marching test

Want to compare your GPU against the Radeon RX 640 and these results? Download our free and quick PC Performance Test.

Geekbench (OpenCL)
Geekbench (OpenCL)
Geekbench (Vulkan)
Geekbench (Vulkan)
15,883 15,859

Compare these benchmarks and specs using our GPU Comparison Tool.

GPU Comparison

The AMD Radeon RX 640 compared against popular alternatives. Compare against more GPUs with our GPU Comparison Tool.

NVIDIA GeForce RTX 3050
59 %
NVIDIA GeForce GTX 1650
36 %
NVIDIA GeForce GTX 1060
34 %
NVIDIA GeForce GTX 1050 Ti
25 %
AMD Radeon RX 550
15 %
AMD Radeon R7 260X
14 %
AMD Radeon RX 640
10 %


Core Clock 1082 MHz
Boost Clock 1287 MHz
Memory Type GDDR5
Memory Size 4 GiB
Bus Width 64 bit
Memory Bandwidth 56 GB/s
TDP 50 W
Family Radeon 600 Series
DirectX Support 12
OpenGL Support 4.6
Pixel Rate 21 Gigapixels/s
Texture Rate 51 Gigatexels/s
Texture Mapping Units 40
Render Output Processors 16

AMD Radeon RX 640

The Radeon RX 640 is a GPU from AMD. This chip has a bad gaming score at 10% in our GPU benchmark.

The Radeon RX 640 has 4 GiB of GDDR5 memory, with a total memory bandwidth of 54 GB/s. The memory bus has a width of 64 bits. More memory is beneficial when gaming at high resolutions as the memory needs to store the frame buffer and all the game textures. If you run out of memory, you will experience poor performance as the GPU needs to swap data in and out of the memory as it is used.

In terms of clock speed, the Radeon RX 640 GPU core runs at a frequency of 1082 MHz and if power and temperature permits, it can boost up to 1287 MHz. The core clock is directly related to the performance of a GPU, the higher the clock, the more processing can be done per second. A higher clock does not guarantee better performance by itself, this also depends on the number of shading units and other elements of the pipeline.

The performance specs of the Radeon RX 640 are this AMD GPU has a pixel rate of 21 Gigapixels/s, the number of pixels the GPU is capable of outputting every second. Furthermore, it has a texture fill rate of 51 Gigatexels/s, the number of pixels the GPU can renderer per second.

As for rendering API support, the Radeon RX 640 supports up to DirectX 12. In addition, in cross-platform titles, OpenGL 4.6 features are supported. Newer APIs are usually more efficient, allowing for better performance in games and better graphical effects.

The raw technical specs of the Radeon RX 640 are: 40 texture mapping units (specialised processors for texture operations, this determines the texture rate) and 16 render output processors or units (the final step in the rendering pipeline, responsible for rasterising the image)

Power and thermals for the AMD Radeon RX 640 are a TDP (Thermal Design Power) of 50 watts. This measures the amount of heat the GPU produces when running at 100%. This isn't a measure of power consumption, but it's a good estimate.

To figure out your graphics card specs and performance, download our free GPU Benchmark utility.


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