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Radeon HD 7990 vs Radeon RX 480

Intro

The Radeon HD 7990 comes with core clock speeds of 950 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 RAM. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Compare those specifications to the Radeon RX 480, which has GPU core speed of 1120 MHz, and 8192 MB of GDDR5 memory running at 2000 MHz through a 256-bit bus. It also is made up of 2304 Stream Processors, 144 TAUs, and 32 Raster Operation 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 HD 7990 15520 points
Radeon RX 480 13349 points
Difference: 2171 (16%)

Ethereum Mining Hash Rate

Radeon HD 7990 32 Mh/s
Radeon RX 480 27 Mh/s
Difference: 5 (19%)

Zcash Mining Hash Rate

Radeon HD 7990 513 Sol/s
Radeon RX 480 280 Sol/s
Difference: 233 (83%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480 150 Watts
Radeon HD 7990 375 Watts
Difference: 225 Watts (150%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7990 should be quite a bit faster than the Radeon RX 480 overall. (explain)

Radeon HD 7990 576000 MB/sec
Radeon RX 480 262144 MB/sec
Difference: 313856 (120%)

Texel Rate

The Radeon HD 7990 is quite a bit (more or less 51%) better at texture filtering than the Radeon RX 480. (explain)

Radeon HD 7990 243200 Mtexels/sec
Radeon RX 480 161280 Mtexels/sec
Difference: 81920 (51%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7990 is the winner, by far. (explain)

Radeon HD 7990 60800 Mpixels/sec
Radeon RX 480 35840 Mpixels/sec
Difference: 24960 (70%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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Radeon HD 7990

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 7990 Radeon RX 480
Manufacturer AMD AMD
Year April 2013 June 2016
Code Name Malta Polaris 10
Memory 3072 MB (x2) 8192 MB
Core Speed 950 MHz (x2) 1120 MHz
Memory Speed 6000 MHz (x2) 8000 MHz
Power (Max TDP) 375 watts 150 watts
Bandwidth 576000 MB/sec 262144 MB/sec
Texel Rate 243200 Mtexels/sec 161280 Mtexels/sec
Pixel Rate 60800 Mpixels/sec 35840 Mpixels/sec
Unified Shaders 2048 (x2) 2304
Texture Mapping Units 128 (x2) 144
Render Output Units 32 (x2) 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit (x2) 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 4.3 OpenGL 4.5

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher 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 amount of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 7990

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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