AMD Radeon R9 390X vs AMD Radeon RX 580X

Compare AMD Radeon R9 390X 8 GB vs AMD Radeon RX 580X 8 GB, specs and GPU benchmark score. Which is the better graphics card for the money?

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Specifications
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Benchmark Score

Overall Score

General gaming and workstation score

65 points

2318 points

3466% significantly better overall score

Flux Core frame rate

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

25 FPS

47 FPS

22 FPS significantly higher Flux Core frame rate

Electron frame rate

Randomly generated noise sphere test

23 FPS

35 FPS

12 FPS significantly higher Electron frame rate

City frame rate

Procedurally generated city scene with voxel rendering

30 FPS

51 FPS

21 FPS significantly higher City frame rate

Clouds frame rate

Real-time noise calculation and ray marching test

14 FPS

19 FPS

5 FPS significantly higher Clouds frame rate

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Specifications

Core Clock Speed

Nominal chip frequency

1050 MHz

1257 MHz

19% slightly higher core clock speed

Boost Clock Speed

Higher turbo frequency when power conditions are met

1050 MHz

1340 MHz

27% slightly higher boost clock speed

Memory

Onboard memory size for textures and vertices

8 GiB

Identical

8 GiB

Memory Bus Width

Number of parallel lines to the memory chips

512 Bit

100% significantly larger memory bus width

256 Bit

Memory Bandwidth

Data transfer speed between GPU core and memory

384 GB/s

49% significantly higher memory bandwidth

256 GB/s

TDP

Thermal Design Power: Measure of heat generated by the GPU

275 W

185 W

48% significantly lower TDP

Pixel Rate

Number of pixels that can be rendered per second

67.2 Gigapixels/s

56% significantly higher pixel rate

42.88 Gigapixels/s

Texture Rate

Number of textured pixels that can be rendered per second

184.8 Gigatexels/s

192.96 Gigatexels/s

4% slightly higher texture rate

Floating Point Performance

Raw number of floating point operations per second

5.91 TFLOPS

6.18 TFLOPS

4% slightly better floating point performance

Shading Units

Number of processors dedicated to shader processing

2816

22% slightly more shading units

2304

Texture Mapping Units

Number of processors dedicated to applying textures

176

22% slightly more texture mapping units

144

Render Output Processors

Number of processors dedicated to final pixel rendering

100% significantly more render output processors

Other details

Rank

Ranking in the hardwareDB database

534th of 586

189th of 586

Family

The product line

Radeon R9 300 Series

Radeon RX 500X Series

Release date

The official date of release of this chip

2015 June

2018 March

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 390X vs Radeon RX 580X specs and performance

In our benchmarks, the Radeon RX 580X beats the Radeon R9 390X in gaming performance.

Our database shows that the Radeon RX 580X 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 580X also has a slightly higher boost clock speed: the maximum frequency the chip can reach if power delivery and thermals allow.

Furthermore, the spec sheet for both these GPUs show that they both have the same amount of memory at 8 GiB. Memory size doesn't directly affect performance, but too little memory will certainly degrade gaming performance.

In addition, the Radeon RX 580X has a significantly lower TDP at 185 W when compared to the Radeon R9 390X at 275 W. TDP (Thermal Design Power) measures total heat output from the chip.

In conclusion, all specs and GPU benchmarks considered, will recommend the Radeon RX 580X over the Radeon R9 390X.