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Radeon HD 7790 vs Radeon RX 480 4GB

Intro

The Radeon HD 7790 features a GPU core speed of 1000 MHz, and the 1024 MB of GDDR5 memory runs at 1500 MHz through a 128-bit bus. It also is comprised of 896 SPUs, 56 Texture Address Units, and 16 ROPs.

Compare that to the Radeon RX 480 4GB, which features a core clock speed of 1120 MHz and a GDDR5 memory frequency of 1750 MHz. It also makes use of a 256-bit bus, and makes use of a 14 nm design. It is made up of 2304 SPUs, 144 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790 85 Watts
Radeon RX 480 4GB 150 Watts
Difference: 65 Watts (76%)

Memory Bandwidth

Performance-wise, the Radeon RX 480 4GB should in theory be quite a bit better than the Radeon HD 7790 in general. (explain)

Radeon RX 480 4GB 229376 MB/sec
Radeon HD 7790 96000 MB/sec
Difference: 133376 (139%)

Texel Rate

The Radeon RX 480 4GB is a lot (more or less 188%) faster with regards to texture filtering than the Radeon HD 7790. (explain)

Radeon RX 480 4GB 161280 Mtexels/sec
Radeon HD 7790 56000 Mtexels/sec
Difference: 105280 (188%)

Pixel Rate

The Radeon RX 480 4GB should be a lot (about 124%) more effective at full screen anti-aliasing than the Radeon HD 7790, and should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon RX 480 4GB 35840 Mpixels/sec
Radeon HD 7790 16000 Mpixels/sec
Difference: 19840 (124%)

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 7790

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.

Specifications

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Model Radeon HD 7790 Radeon RX 480 4GB
Manufacturer AMD AMD
Year March 2013 June 2016
Code Name Bonaire XT Polaris 10
Memory 1024 MB 4096 MB
Core Speed 1000 MHz 1120 MHz
Memory Speed 6000 MHz 7000 MHz
Power (Max TDP) 85 watts 150 watts
Bandwidth 96000 MB/sec 229376 MB/sec
Texel Rate 56000 Mtexels/sec 161280 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 35840 Mpixels/sec
Unified Shaders 896 2304
Texture Mapping Units 56 144
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 14 nm
Transistors 2080 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: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better 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 can be applied in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably 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

Hide Prices

Radeon HD 7790

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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