AMD Radeon RX 6700 XT vs AMD Radeon HD 7990

Compare AMD Radeon RX 6700 XT 12 GB vs AMD Radeon HD 7990 3 GB, specs and GPU benchmark score. Which is the better graphics card for the money?

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AMD Radeon HD 7990

Price

The cheapest price from our partner retailers

$ 424.97

$ 249.99 significantly less expensive

$ 674.96

Benchmark Score

Overall Score

General gaming and workstation score

7241 points

315% significantly better overall score

1743 points

Flux Core frame rate

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

148 FPS

107 FPS significantly higher Flux Core frame rate

41 FPS

Electron frame rate

Randomly generated noise sphere test

108 FPS

82 FPS significantly higher Electron frame rate

25 FPS

City frame rate

Procedurally generated city scene with voxel rendering

131 FPS

96 FPS significantly higher City frame rate

35 FPS

Clouds frame rate

Real-time noise calculation and ray marching test

62 FPS

49 FPS significantly higher Clouds frame rate

14 FPS

Free GPU Benchmark

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Specifications

Core Clock Speed

Nominal chip frequency

2321 MHz

144% significantly higher core clock speed

950 MHz

Boost Clock Speed

Higher turbo frequency when power conditions are met

2581 MHz

158% significantly higher boost clock speed

1000 MHz

Memory

Onboard memory size for textures and vertices

12 GiB

300% significantly more memory

3 GiB

Memory Bus Width

Number of parallel lines to the memory chips

192 Bit

384 Bit

100% significantly larger memory bus width

Memory Bandwidth

Data transfer speed between GPU core and memory

384 GB/s

33% slightly higher memory bandwidth

288 GB/s

TDP

Thermal Design Power: Measure of heat generated by the GPU

230 W

63% significantly lower TDP

375 W

Pixel Rate

Number of pixels that can be rendered per second

165.2 Gigapixels/s

416% significantly higher pixel rate

32 Gigapixels/s

Texture Rate

Number of textured pixels that can be rendered per second

413 Gigatexels/s

222% significantly higher texture rate

128 Gigatexels/s

Floating Point Performance

Raw number of floating point operations per second

13.21 TFLOPS

222% significantly better floating point performance

4.10 TFLOPS

Shading Units

Number of processors dedicated to shader processing

2560

25% slightly more shading units

2048

Texture Mapping Units

Number of processors dedicated to applying textures

160

25% slightly more texture mapping units

128

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

64th of 586

223rd of 586

Family

The product line

Radeon RX 6000 Series

Radeon HD 7000 Series

Release date

The official date of release of this chip

2021 March

Memory Type

The type of memory used by this chip

GDDR6

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 6700 XT vs Radeon HD 7990 specs and performance

For gaming, the Radeon RX 6700 XT graphics card is better than the Radeon HD 7990 in our tests.

Our database shows that the Radeon RX 6700 XT has a significantly 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 6700 XT also has a significantly 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 RX 6700 XT has significantly more memory with 12 GiB of memory compared to 3 GiB. If you're planning at playing games at high resolutions with high-quality textures, you will need a lot of memory.

In addition, the Radeon RX 6700 XT has a significantly lower TDP at 230 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 conclusion, all specs and GPU benchmarks considered, will recommend the Radeon RX 6700 XT over the Radeon HD 7990.