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Radeon HD 7950 vs Radeon RX 590

Intro

The Radeon HD 7950 features a GPU core clock speed of 800 MHz, and the 1536 MB of GDDR5 memory runs at 1250 MHz through a 384-bit bus. It also is made up of 1792 SPUs, 112 TAUs, and 32 ROPs.

Compare that to the Radeon RX 590, which has a clock frequency of 1469 MHz and a GDDR5 memory speed of 2000 MHz. It also features a 256-bit memory bus, and uses a 12 nm design. It is comprised of 2304 SPUs, 144 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 590 175 Watts
Radeon HD 7950 200 Watts
Difference: 25 Watts (14%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 590 will be 9% quicker than the Radeon HD 7950 overall, due to its higher bandwidth. (explain)

Radeon RX 590 262144 MB/sec
Radeon HD 7950 240000 MB/sec
Difference: 22144 (9%)

Texel Rate

The Radeon RX 590 should be quite a bit (approximately 136%) faster with regards to anisotropic filtering than the Radeon HD 7950. (explain)

Radeon RX 590 211536 Mtexels/sec
Radeon HD 7950 89600 Mtexels/sec
Difference: 121936 (136%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 590 is the winner, by a large margin. (explain)

Radeon RX 590 47008 Mpixels/sec
Radeon HD 7950 25600 Mpixels/sec
Difference: 21408 (84%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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Radeon HD 7950

Amazon.com

Radeon RX 590

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon HD 7950 Radeon RX 590
Manufacturer AMD AMD
Year January 2012 November 2018
Code Name Tahiti Pro Polaris 30
Memory 1536 MB 8192 MB
Core Speed 800 MHz 1469 MHz
Memory Speed 5000 MHz 8000 MHz
Power (Max TDP) 200 watts 175 watts
Bandwidth 240000 MB/sec 262144 MB/sec
Texel Rate 89600 Mtexels/sec 211536 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 47008 Mpixels/sec
Unified Shaders 1792 2304
Texture Mapping Units 112 144
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 28 nm 12 nm
Transistors 4313 million 5700 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 12.0
OpenGL Version OpenGL 4.2 OpenGL 4.5

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 7950

Amazon.com

Radeon RX 590

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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