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Radeon R9 380 4G vs Radeon RX 470

Intro

The Radeon R9 380 4G features a GPU core clock speed of 970 MHz, and the 4096 MB of GDDR5 memory is set to run at 1425 MHz through a 256-bit bus. It also is comprised of 1792 Stream Processors, 112 TAUs, and 32 ROPs.

Compare that to the Radeon RX 470, which features a core clock speed of 926 MHz and a GDDR5 memory frequency of 1650 MHz. It also features a 256-bit memory bus, and uses a 14 nm design. It is comprised 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 380 4G 190 Watts
Difference: 70 Watts (58%)

Memory Bandwidth

The Radeon RX 470, in theory, should be a little bit faster than the Radeon R9 380 4G in general. (explain)

Radeon RX 470 211200 MB/sec
Radeon R9 380 4G 182400 MB/sec
Difference: 28800 (16%)

Texel Rate

The Radeon RX 470 will be a bit (about 9%) faster with regards to texture filtering than the Radeon R9 380 4G. (explain)

Radeon RX 470 118528 Mtexels/sec
Radeon R9 380 4G 108640 Mtexels/sec
Difference: 9888 (9%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 380 4G is superior to the Radeon RX 470, but not by far. (explain)

Radeon R9 380 4G 31040 Mpixels/sec
Radeon RX 470 29632 Mpixels/sec
Difference: 1408 (5%)

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 380 4G

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 380 4G Radeon RX 470
Manufacturer AMD AMD
Year June 2015 August 2016
Code Name Antigua PRO Polaris 10
Memory 4096 MB 8192 MB
Core Speed 970 MHz 926 MHz
Memory Speed 5700 MHz 6600 MHz
Power (Max TDP) 190 watts 120 watts
Bandwidth 182400 MB/sec 211200 MB/sec
Texel Rate 108640 Mtexels/sec 118528 Mtexels/sec
Pixel Rate 31040 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 256-bit 256-bit
Fab Process 28 nm 14 nm
Transistors 5000 million 5700 million
Bus PCIe 3.0 ×16 PCIe 3.0 x16
DirectX Version DirectX 12.0 DirectX 12.0
OpenGL Version OpenGL 4.5 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at handling 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 can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

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