AMD Radeon R9 390 vs AMD Radeon RX 640

Compare AMD Radeon R9 390 8 GB vs AMD Radeon RX 640 4 GB, specs and GPU benchmark score. Which is the better graphics card for the money?

Benchmark Score
Other Benchmarks
Specifications
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Benchmark Score

Overall Score

General gaming and workstation score

1919 points

245% significantly better overall score

556 points

Flux Core frame rate

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

44 FPS

31 FPS significantly higher Flux Core frame rate

14 FPS

Electron frame rate

Randomly generated noise sphere test

28 FPS

19 FPS significantly higher Electron frame rate

9 FPS

City frame rate

Procedurally generated city scene with voxel rendering

39 FPS

27 FPS significantly higher City frame rate

13 FPS

Clouds frame rate

Real-time noise calculation and ray marching test

15 FPS

12 FPS significantly higher Clouds frame rate

4 FPS

Free GPU Benchmark

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Other Benchmarks

Geekbench 5 (OpenCL) score

OpenCL compute benchmark

46328 points

191% significantly higher Geekbench 5 (OpenCL) score

15883 points

Geekbench 5 (Vulkan) score

Vulkan compute benchmark

49594 points

212% significantly higher Geekbench 5 (Vulkan) score

15859 points

Geekbench 6 (OpenCL) score

OpenCL compute benchmark

43704 points

204% significantly higher Geekbench 6 (OpenCL) score

14348 points

Geekbench 6 (Vulkan) score

Vulkan compute benchmark

51251 points

212% significantly higher Geekbench 6 (Vulkan) score

16397 points

Specifications

Core Clock Speed

Nominal chip frequency

1000 MHz

1082 MHz

8% slightly higher core clock speed

Boost Clock Speed

Higher turbo frequency when power conditions are met

1000 MHz

1287 MHz

28% slightly higher boost clock speed

Memory

Onboard memory size for textures and vertices

8 GiB

100% significantly more memory

4 GiB

Memory Bus Width

Number of parallel lines to the memory chips

512 Bit

700% significantly larger memory bus width

64 Bit

Memory Bandwidth

Data transfer speed between GPU core and memory

384 GB/s

585% significantly higher memory bandwidth

56 GB/s

TDP

Thermal Design Power: Measure of heat generated by the GPU

275 W

50 W

450% significantly lower TDP

Pixel Rate

Number of pixels that can be rendered per second

64 Gigapixels/s

210% significantly higher pixel rate

20.6 Gigapixels/s

Texture Rate

Number of textured pixels that can be rendered per second

160 Gigatexels/s

210% significantly higher texture rate

51.48 Gigatexels/s

Texture Mapping Units

Number of processors dedicated to applying textures

160

300% significantly more texture mapping units

Render Output Processors

Number of processors dedicated to final pixel rendering

300% significantly more render output processors

Other details

Rank

Ranking in the hardwareDB database

215th of 586

318th of 586

Family

The product line

Radeon R9 300 Series

Radeon 600 Series

Release date

The official date of release of this chip

2015 June

Memory Type

The type of memory used by this chip

GDDR5

DirectX Support

Maximum version of DirectX supported

12.0

OpenGL Support

Maximum version of OpenGL supported

4.5

4.6

Radeon R9 390 vs Radeon RX 640 benchmarks

For gaming, the Radeon R9 390 graphics card is better than the Radeon RX 640 in our tests.

Our database shows that the Radeon RX 640 has a slightly higher core clock speed. The core clock speed (or base speed) is the frequency at which the GPU core runs. This metric makes sense when comparing GPUs of a similar architecture or generation. In addition, the Radeon RX 640 also has a slightly 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.

As stated by the manufacturer, the Radeon R9 390 has significantly more memory with 8 GiB of memory compared to 4 GiB. Memory size doesn't directly affect performance, but too little memory will certainly degrade gaming performance.

In addition, the Radeon RX 640 has a significantly lower TDP at 50 W when compared to the Radeon R9 390 at 275 W. This is not a measure of performance, but rather the amount of heat generated by the chip when running at its highest speed.

According to the results of the hardwareDB benchmark utility, the Radeon R9 390 is faster than the Radeon RX 640.