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Radeon R9 280 vs Radeon RX 470

Intro

The Radeon R9 280 makes use of a 28 nm design. AMD has set the core speed at 933 MHz. The GDDR5 RAM runs at a frequency of 1250 MHz on this particular model. It features 1792 SPUs along with 112 Texture Address Units and 32 Rasterization Operator Units.

Compare all that to the Radeon RX 470, which comes with core clock speeds of 926 MHz on the GPU, and 1650 MHz on the 8192 MB of GDDR5 RAM. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 120 Watts
Radeon R9 280 250 Watts
Difference: 130 Watts (108%)

Memory Bandwidth

In theory, the Radeon R9 280 should be a bit faster than the Radeon RX 470 overall. (explain)

Radeon R9 280 240000 MB/sec
Radeon RX 470 211200 MB/sec
Difference: 28800 (14%)

Texel Rate

The Radeon RX 470 should be just a bit (approximately 13%) more effective at AF than the Radeon R9 280. (explain)

Radeon RX 470 118528 Mtexels/sec
Radeon R9 280 104496 Mtexels/sec
Difference: 14032 (13%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 280 is superior to the Radeon RX 470, not by a very large margin though. (explain)

Radeon R9 280 29856 Mpixels/sec
Radeon RX 470 29632 Mpixels/sec
Difference: 224 (1%)

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

Radeon R9 280

Radeon RX 470

Specifications

Display Specifications

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Model Radeon R9 280 Radeon RX 470
Manufacturer AMD AMD
Year March 2014 August 2016
Code Name Tahiti Pro Polaris 10
Memory 3072 MB 8192 MB
Core Speed 933 MHz 926 MHz
Memory Speed 5000 MHz 6600 MHz
Power (Max TDP) 250 watts 120 watts
Bandwidth 240000 MB/sec 211200 MB/sec
Texel Rate 104496 Mtexels/sec 118528 Mtexels/sec
Pixel Rate 29856 Mpixels/sec 29632 Mpixels/sec
Unified Shaders 1792 2048
Texture Mapping Units 112 128
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 11.2 DirectX 12.0
OpenGL Version OpenGL 4.3 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be transported over the external memory interface in one second. It's calculated 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 it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per 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 better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the clock speed of the card. 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 rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Radeon R9 280

Radeon RX 470

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