AMD Radeon RX 580X vs AMD Radeon HD 7990

Compare AMD Radeon RX 580X 8 GB vs AMD Radeon HD 7990 3 GB, specs and GPU benchmark score. Which is the better graphics card for the money?

Benchmark Score
Specifications
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Benchmark Score

Overall Score

General gaming and workstation score

2318 points

32% slightly better overall score

1743 points

Flux Core frame rate

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

47 FPS

6 FPS slightly higher Flux Core frame rate

41 FPS

Electron frame rate

Randomly generated noise sphere test

35 FPS

10 FPS significantly higher Electron frame rate

25 FPS

City frame rate

Procedurally generated city scene with voxel rendering

51 FPS

15 FPS significantly higher City frame rate

35 FPS

Clouds frame rate

Real-time noise calculation and ray marching test

19 FPS

6 FPS significantly higher Clouds frame rate

14 FPS

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Specifications

Core Clock Speed

Nominal chip frequency

1257 MHz

32% slightly higher core clock speed

950 MHz

Boost Clock Speed

Higher turbo frequency when power conditions are met

1340 MHz

34% slightly higher boost clock speed

1000 MHz

Memory

Onboard memory size for textures and vertices

8 GiB

166% significantly more memory

3 GiB

Memory Bus Width

Number of parallel lines to the memory chips

256 Bit

384 Bit

49% significantly larger memory bus width

Memory Bandwidth

Data transfer speed between GPU core and memory

256 GB/s

288 GB/s

12% slightly higher memory bandwidth

TDP

Thermal Design Power: Measure of heat generated by the GPU

185 W

102% significantly lower TDP

375 W

Pixel Rate

Number of pixels that can be rendered per second

42.88 Gigapixels/s

34% slightly higher pixel rate

32 Gigapixels/s

Texture Rate

Number of textured pixels that can be rendered per second

192.96 Gigatexels/s

50% significantly higher texture rate

128 Gigatexels/s

Floating Point Performance

Raw number of floating point operations per second

6.18 TFLOPS

50% significantly better floating point performance

4.10 TFLOPS

Shading Units

Number of processors dedicated to shader processing

2304

12% slightly more shading units

2048

Texture Mapping Units

Number of processors dedicated to applying textures

144

12% slightly more texture mapping units

128

Render Output Processors

Number of processors dedicated to final pixel rendering

Identical

Other details

Rank

Ranking in the hardwareDB database

189th of 586

223rd of 586

Family

The product line

Radeon RX 500X Series

Radeon HD 7000 Series

Release date

The official date of release of this chip

2018 March

Memory Type

The type of memory used by this chip

GDDR5

DirectX Support

Maximum version of DirectX supported

12.0

11.2

OpenGL Support

Maximum version of OpenGL supported

4.6

4.4

Radeon RX 580X vs Radeon HD 7990 specs and performance

According to the hardwareDB Benchmark, the Radeon RX 580X GPU is faster than the Radeon HD 7990 in gaming.

In our comparison, the Radeon RX 580X 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. 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 the Radeon RX 580X has significantly more memory with 8 GiB of memory compared to 3 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 HD 7990 at 375 W. Heat output doesn't match power consumption directly but, it's a good estimate.

According to the results of the hardwareDB benchmark utility, the Radeon RX 580X is faster than the Radeon HD 7990.