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Radeon HD 7950 vs Radeon RX 480 4GB

Intro

The Radeon HD 7950 features a GPU core clock speed of 800 MHz, and the 1536 MB of GDDR5 memory is set to run at 1250 MHz through a 384-bit bus. It also is comprised of 1792 Stream Processors, 112 Texture Address Units, and 32 Raster Operation Units.

Compare all of that to the Radeon RX 480 4GB, which comes with core clock speeds of 1120 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 memory. It features 2304 SPUs as well as 144 Texture Address Units and 32 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

Zcash Mining Hash Rate

Radeon RX 480 4GB 267 Sol/s
Radeon HD 7950 235 Sol/s
Difference: 32 (14%)

Ethereum Mining Hash Rate

Radeon RX 480 4GB 25 Mh/s
Radeon HD 7950 21 Mh/s
Difference: 4 (19%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480 4GB 150 Watts
Radeon HD 7950 200 Watts
Difference: 50 Watts (33%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7950 should be 5% faster than the Radeon RX 480 4GB overall, due to its higher bandwidth. (explain)

Radeon HD 7950 240000 MB/sec
Radeon RX 480 4GB 229376 MB/sec
Difference: 10624 (5%)

Texel Rate

The Radeon RX 480 4GB will be much (about 80%) more effective at texture filtering than the Radeon HD 7950. (explain)

Radeon RX 480 4GB 161280 Mtexels/sec
Radeon HD 7950 89600 Mtexels/sec
Difference: 71680 (80%)

Pixel Rate

The Radeon RX 480 4GB will be quite a bit (about 40%) more effective at FSAA than the Radeon HD 7950, and capable of handling higher resolutions better. (explain)

Radeon RX 480 4GB 35840 Mpixels/sec
Radeon HD 7950 25600 Mpixels/sec
Difference: 10240 (40%)

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

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Radeon RX 480 4GB

Amazon.com

Check prices at:

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 480 4GB
Manufacturer AMD AMD
Year January 2012 June 2016
Code Name Tahiti Pro Polaris 10
Memory 1536 MB 4096 MB
Core Speed 800 MHz 1120 MHz
Memory Speed 5000 MHz 7000 MHz
Power (Max TDP) 200 watts 150 watts
Bandwidth 240000 MB/sec 229376 MB/sec
Texel Rate 89600 Mtexels/sec 161280 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 35840 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 14 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 max amount of information (measured in megabytes per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon HD 7950

Amazon.com

Check prices at:

Radeon RX 480 4GB

Amazon.com

Check prices at:

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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