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Radeon HD 7790 vs Radeon R9 280X

Intro

The Radeon HD 7790 has a core clock frequency of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 128-bit bus, and uses a 28 nm design. It features 896 SPUs, 56 TAUs, and 16 ROPs.

Compare that to the Radeon R9 280X, which comes with a clock frequency of 850 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 384-bit bus, and uses a 28 nm design. It features 2048 SPUs, 128 Texture Address Units, 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 R9 280X 8886 points
Radeon HD 7790 4330 points
Difference: 4556 (105%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

As far as performance goes, the Radeon R9 280X should in theory be a lot better than the Radeon HD 7790 overall. (explain)

Radeon R9 280X 288000 MB/sec
Radeon HD 7790 96000 MB/sec
Difference: 192000 (200%)

Texel Rate

The Radeon R9 280X should be much (more or less 94%) more effective at texture filtering than the Radeon HD 7790. (explain)

Radeon R9 280X 108800 Mtexels/sec
Radeon HD 7790 56000 Mtexels/sec
Difference: 52800 (94%)

Pixel Rate

The Radeon R9 280X will be a lot (about 70%) better at anti-aliasing than the Radeon HD 7790, and also capable of handling higher resolutions better. (explain)

Radeon R9 280X 27200 Mpixels/sec
Radeon HD 7790 16000 Mpixels/sec
Difference: 11200 (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.

Price Comparison

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Radeon HD 7790

Amazon.com

Check prices at:

Radeon R9 280X

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 280X
Manufacturer AMD AMD
Year March 2013 October 2013
Code Name Bonaire XT Tahiti XTL
Memory 1024 MB 3072 MB
Core Speed 1000 MHz 850 MHz
Memory Speed 6000 MHz 6000 MHz
Power (Max TDP) 85 watts 250 watts
Bandwidth 96000 MB/sec 288000 MB/sec
Texel Rate 56000 Mtexels/sec 108800 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 896 2048
Texture Mapping Units 56 128
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 maximum amount of data (counted in MB per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 per second. This number is calculated 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 7790

Amazon.com

Check prices at:

Radeon R9 280X

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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