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Radeon R9 270X vs Radeon RX 470

Intro

The Radeon R9 270X features clock speeds of 1000 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 memory. It features 1280 SPUs as well as 80 Texture Address Units and 32 ROPs.

Compare all of that to the Radeon RX 470, which comes with a clock frequency of 926 MHz and a GDDR5 memory frequency of 1650 MHz. It also makes use of a 256-bit memory bus, and makes use of a 14 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 120 Watts
Radeon R9 270X 180 Watts
Difference: 60 Watts (50%)

Memory Bandwidth

As far as performance goes, the Radeon RX 470 should theoretically be a bit superior to the Radeon R9 270X in general. (explain)

Radeon RX 470 211200 MB/sec
Radeon R9 270X 179200 MB/sec
Difference: 32000 (18%)

Texel Rate

The Radeon RX 470 will be much (approximately 48%) better at AF than the Radeon R9 270X. (explain)

Radeon RX 470 118528 Mtexels/sec
Radeon R9 270X 80000 Mtexels/sec
Difference: 38528 (48%)

Pixel Rate

The Radeon R9 270X is a small bit (approximately 8%) better at full screen anti-aliasing than the Radeon RX 470, and should be able to handle higher resolutions better. (explain)

Radeon R9 270X 32000 Mpixels/sec
Radeon RX 470 29632 Mpixels/sec
Difference: 2368 (8%)

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 270X

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 270X Radeon RX 470
Manufacturer AMD AMD
Year October 2013 August 2016
Code Name Curacao XT Polaris 10
Memory 2048 MB 8192 MB
Core Speed 1000 MHz 926 MHz
Memory Speed 5600 MHz 6600 MHz
Power (Max TDP) 180 watts 120 watts
Bandwidth 179200 MB/sec 211200 MB/sec
Texel Rate 80000 Mtexels/sec 118528 Mtexels/sec
Pixel Rate 32000 Mpixels/sec 29632 Mpixels/sec
Unified Shaders 1280 2048
Texture Mapping Units 80 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 14 nm
Transistors 2800 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 maximum amount of information (in units of megabytes per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

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