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Radeon R9 380 4G vs Radeon RX 470

Intro

The Radeon R9 380 4G uses a 28 nm design. AMD has clocked the core frequency at 970 MHz. The GDDR5 RAM is set to run at a frequency of 1425 MHz on this particular card. It features 1792 SPUs along with 112 Texture Address Units and 32 ROPs.

Compare those specifications to the Radeon RX 470, which uses a 14 nm design. AMD has set the core frequency at 926 MHz. The GDDR5 memory runs at a speed of 1650 MHz on this particular card. It features 2048 SPUs as well as 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 380 4G 190 Watts
Difference: 70 Watts (58%)

Memory Bandwidth

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

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

Texel Rate

The Radeon RX 470 should be a small bit (about 9%) faster with regards to anisotropic 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 lots of anti-aliasing is important to you, then the Radeon R9 380 4G is a better choice, 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

Radeon R9 380 4G

Radeon RX 470

Specifications

Display 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: Bandwidth is the max amount of data (counted in MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out 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 video 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 most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units 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 fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Radeon R9 380 4G

Radeon RX 470

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