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Radeon HD 7950 vs Radeon RX 480

Intro

The Radeon HD 7950 features a clock speed of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 384-bit bus, and makes use of a 28 nm design. It features 1792 SPUs, 112 TAUs, and 32 ROPs.

Compare those specifications to the Radeon RX 480, which features clock speeds of 1120 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR5 RAM. It features 2304 SPUs along with 144 TAUs 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.

3DMark Fire Strike Graphics Score

Radeon RX 480 13349 points
Radeon HD 7950 7731 points
Difference: 5618 (73%)

Zcash Mining Hash Rate

Radeon RX 480 280 Sol/s
Radeon HD 7950 235 Sol/s
Difference: 45 (19%)

Ethereum Mining Hash Rate

Radeon RX 480 27 Mh/s
Radeon HD 7950 21 Mh/s
Difference: 6 (29%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

As far as performance goes, the Radeon RX 480 should in theory be just a bit superior to the Radeon HD 7950 overall. (explain)

Radeon RX 480 262144 MB/sec
Radeon HD 7950 240000 MB/sec
Difference: 22144 (9%)

Texel Rate

The Radeon RX 480 is a lot (approximately 80%) better at texture filtering than the Radeon HD 7950. (explain)

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

Pixel Rate

The Radeon RX 480 will be much (about 40%) better at AA than the Radeon HD 7950, and able to handle higher screen resolutions more effectively. (explain)

Radeon RX 480 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

Amazon.com

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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
Manufacturer AMD AMD
Year January 2012 June 2016
Code Name Tahiti Pro Polaris 10
Memory 1536 MB 8192 MB
Core Speed 800 MHz 1120 MHz
Memory Speed 5000 MHz 8000 MHz
Power (Max TDP) 200 watts 150 watts
Bandwidth 240000 MB/sec 262144 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: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Radeon HD 7950

Amazon.com

Check prices at:

Radeon RX 480

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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