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Radeon HD 7950 vs Radeon RX 480 4GB

Intro

The Radeon HD 7950 comes with a GPU clock speed of 800 MHz, and the 1536 MB of GDDR5 RAM runs at 1250 MHz through a 384-bit bus. It also is made up of 1792 SPUs, 112 TAUs, and 32 Raster Operation Units.

Compare those specs to the Radeon RX 480 4GB, which features a clock frequency of 1120 MHz and a GDDR5 memory speed of 1750 MHz. It also uses a 256-bit memory bus, and makes use of a 14 nm design. It features 2304 SPUs, 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

Performance-wise, the Radeon HD 7950 should in theory be a little bit better than the Radeon RX 480 4GB overall. (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 (approximately 80%) more effective at AF than the Radeon HD 7950. (explain)

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

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 480 4GB is the winner, by far. (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 maximum amount of data (measured in megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video 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 maximum number of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to 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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