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Radeon HD 7790 vs Radeon R9 280

Intro

The Radeon HD 7790 makes use of a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 memory works at a frequency of 1500 MHz on this particular card. It features 896 SPUs along with 56 Texture Address Units and 16 ROPs.

Compare those specs to the Radeon R9 280, which makes use of a 28 nm design. AMD has set the core frequency at 933 MHz. The GDDR5 RAM works at a frequency of 1250 MHz on this model. It features 1792 SPUs along with 112 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 R9 280 7961 points
Radeon HD 7790 4330 points
Difference: 3631 (84%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790 85 Watts
Radeon R9 280 250 Watts
Difference: 165 Watts (194%)

Memory Bandwidth

In theory, the Radeon R9 280 is 150% faster than the Radeon HD 7790 in general, due to its greater bandwidth. (explain)

Radeon R9 280 240000 MB/sec
Radeon HD 7790 96000 MB/sec
Difference: 144000 (150%)

Texel Rate

The Radeon R9 280 is much (more or less 87%) more effective at texture filtering than the Radeon HD 7790. (explain)

Radeon R9 280 104496 Mtexels/sec
Radeon HD 7790 56000 Mtexels/sec
Difference: 48496 (87%)

Pixel Rate

The Radeon R9 280 is much (about 87%) better at AA than the Radeon HD 7790, and also able to handle higher screen resolutions better. (explain)

Radeon R9 280 29856 Mpixels/sec
Radeon HD 7790 16000 Mpixels/sec
Difference: 13856 (87%)

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

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Radeon R9 280

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 R9 280
Manufacturer AMD AMD
Year March 2013 March 2014
Code Name Bonaire XT Tahiti Pro
Memory 1024 MB 3072 MB
Core Speed 1000 MHz 933 MHz
Memory Speed 6000 MHz 5000 MHz
Power (Max TDP) 85 watts 250 watts
Bandwidth 96000 MB/sec 240000 MB/sec
Texel Rate 56000 Mtexels/sec 104496 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 29856 Mpixels/sec
Unified Shaders 896 1792
Texture Mapping Units 56 112
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 384-bit
Fab Process 28 nm 28 nm
Transistors 2080 million 4313 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 11.2
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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 - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Radeon HD 7790

Amazon.com

Check prices at:

Radeon R9 280

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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