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Radeon HD 7950 3GB vs Radeon RX 480

Intro

The Radeon HD 7950 3GB comes with a clock frequency of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 384-bit bus, and uses a 28 nm design. It is made up of 1792 SPUs, 112 Texture Address Units, and 32 ROPs.

Compare those specs to the Radeon RX 480, which features a GPU core clock speed of 1120 MHz, and 8192 MB of GDDR5 RAM running at 2000 MHz through a 256-bit bus. It also features 2304 Stream Processors, 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.

Zcash Mining Hash Rate

Radeon RX 480 280 Sol/s
Radeon HD 7950 3GB 229 Sol/s
Difference: 51 (22%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480 150 Watts
Radeon HD 7950 3GB 200 Watts
Difference: 50 Watts (33%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 480 should be just a bit faster than the Radeon HD 7950 3GB overall. (explain)

Radeon RX 480 262144 MB/sec
Radeon HD 7950 3GB 240000 MB/sec
Difference: 22144 (9%)

Texel Rate

The Radeon RX 480 is a lot (more or less 80%) more effective at AF than the Radeon HD 7950 3GB. (explain)

Radeon RX 480 161280 Mtexels/sec
Radeon HD 7950 3GB 89600 Mtexels/sec
Difference: 71680 (80%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 480 is a better choice, and very much so. (explain)

Radeon RX 480 35840 Mpixels/sec
Radeon HD 7950 3GB 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 3GB

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.

Specifications

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Model Radeon HD 7950 3GB Radeon RX 480
Manufacturer AMD AMD
Year January 2012 June 2016
Code Name Tahiti Pro Polaris 10
Memory 3072 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: Bandwidth is the largest amount of data (in units of MB per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher 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 maximum amount of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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Radeon HD 7950 3GB

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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