AMD Radeon R9 280X vs AMD Radeon HD 7990

Compare AMD Radeon R9 280X 3 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

1687 points

1743 points

3% slightly better overall score

Flux Core frame rate

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

40 FPS

41 FPS

0 FPS slightly higher Flux Core frame rate

Electron frame rate

Randomly generated noise sphere test

25 FPS

0 FPS slightly higher Electron frame rate

City frame rate

Procedurally generated city scene with voxel rendering

35 FPS

Identical

35 FPS

Clouds frame rate

Real-time noise calculation and ray marching test

14 FPS

0 FPS slightly higher Clouds frame rate

14 FPS

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Specifications

Core Clock Speed

Nominal chip frequency

850 MHz

950 MHz

11% slightly higher core clock speed

Boost Clock Speed

Higher turbo frequency when power conditions are met

1000 MHz

Identical

1000 MHz

Memory

Onboard memory size for textures and vertices

3 GiB

Identical

3 GiB

Memory Bus Width

Number of parallel lines to the memory chips

384 Bit

Identical

384 Bit

Memory Bandwidth

Data transfer speed between GPU core and memory

288 GB/s

Identical

288 GB/s

TDP

Thermal Design Power: Measure of heat generated by the GPU

250 W

49% significantly lower TDP

375 W

Pixel Rate

Number of pixels that can be rendered per second

32 Gigapixels/s

Identical

32 Gigapixels/s

Texture Rate

Number of textured pixels that can be rendered per second

128 Gigatexels/s

Identical

128 Gigatexels/s

Floating Point Performance

Raw number of floating point operations per second

4.10 TFLOPS

Identical

4.10 TFLOPS

Shading Units

Number of processors dedicated to shader processing

2048

Identical

2048

Texture Mapping Units

Number of processors dedicated to applying textures

128

Identical

128

Render Output Processors

Number of processors dedicated to final pixel rendering

Identical

Other details

Rank

Ranking in the hardwareDB database

226th of 586

223rd of 586

Family

The product line

Radeon R9 200 Series

Radeon HD 7000 Series

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

4.5

4.4

Radeon R9 280X vs Radeon HD 7990 specs and performance

According to the hardwareDB Benchmark, the Radeon HD 7990 GPU is faster than the Radeon R9 280X in gaming.

Our database shows that the Radeon HD 7990 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.

Furthermore, the spec sheet for both these GPUs show that they both have the same amount of memory at 3 GiB. Memory size doesn't directly affect performance, but too little memory will certainly degrade gaming performance.

In addition, the Radeon R9 280X has a significantly lower TDP at 250 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.

In terms of raw gaming performance in our GPU benchmark, the Radeon HD 7990 is better than the Radeon R9 280X.