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Radeon HD 7970 vs Radeon RX 480

Intro

The Radeon HD 7970 uses a 28 nm design. AMD has set the core speed at 925 MHz. The GDDR5 memory is set to run at a speed of 1375 MHz on this particular card. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Compare those specifications to the Radeon RX 480, which makes use of a 14 nm design. AMD has clocked the core speed at 1120 MHz. The GDDR5 RAM runs at a speed of 2000 MHz on this model. It features 2304 SPUs as well as 144 TAUs and 32 Rasterization Operator Units.

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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 7970 8225 points
Difference: 5124 (62%)

Ethereum Mining Hash Rate

Radeon RX 480 27 Mh/s
Radeon HD 7970 21 Mh/s
Difference: 6 (29%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480 150 Watts
Radeon HD 7970 250 Watts
Difference: 100 Watts (67%)

Memory Bandwidth

Performance-wise, the Radeon HD 7970 should theoretically be a small bit superior to the Radeon RX 480 overall. (explain)

Radeon HD 7970 264000 MB/sec
Radeon RX 480 262144 MB/sec
Difference: 1856 (1%)

Texel Rate

The Radeon RX 480 is quite a bit (about 36%) faster with regards to AF than the Radeon HD 7970. (explain)

Radeon RX 480 161280 Mtexels/sec
Radeon HD 7970 118400 Mtexels/sec
Difference: 42880 (36%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX 480 is superior to the Radeon HD 7970, by far. (explain)

Radeon RX 480 35840 Mpixels/sec
Radeon HD 7970 29600 Mpixels/sec
Difference: 6240 (21%)

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 7970

Amazon.com

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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.

Specifications

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Model Radeon HD 7970 Radeon RX 480
Manufacturer AMD AMD
Year January 2012 June 2016
Code Name Tahiti XT Polaris 10
Memory 3072 MB 8192 MB
Core Speed 925 MHz 1120 MHz
Memory Speed 5500 MHz 8000 MHz
Power (Max TDP) 250 watts 150 watts
Bandwidth 264000 MB/sec 262144 MB/sec
Texel Rate 118400 Mtexels/sec 161280 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 35840 Mpixels/sec
Unified Shaders 2048 2304
Texture Mapping Units 128 144
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 max amount of data (counted in MB per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon HD 7970

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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