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Radeon R9 280 vs Radeon RX 470

Intro

The Radeon R9 280 has a clock frequency of 933 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 384-bit memory bus, and uses a 28 nm design. It is comprised of 1792 SPUs, 112 TAUs, and 32 ROPs.

Compare those specs to the Radeon RX 470, which makes use of a 14 nm design. AMD has set the core speed at 926 MHz. The GDDR5 memory works at a frequency of 1650 MHz on this specific model. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.

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

As far as performance goes, the Radeon R9 280 should theoretically be a little bit better 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 a small bit (about 13%) better at anisotropic filtering than the Radeon R9 280. (explain)

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

Pixel Rate

The Radeon R9 280 should be a small bit (about 1%) more effective at AA than the Radeon RX 470, and also should be able to handle higher resolutions without slowing down too much. (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

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Radeon R9 280

Amazon.com

Radeon RX 470

Amazon.com

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 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: Bandwidth is the max amount of data (measured in megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

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