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Radeon R9 380 2G vs Radeon RX 470

Intro

The Radeon R9 380 2G uses a 28 nm design. AMD has set the core frequency at 970 MHz. The GDDR5 memory works at a speed of 1425 MHz on this specific card. It features 1792 SPUs as well as 112 TAUs and 32 Rasterization Operator Units.

Compare those specs to the Radeon RX 470, which uses a 14 nm design. AMD has clocked the core speed at 926 MHz. The GDDR5 memory is set to run at a frequency of 1650 MHz on this model. It features 2048 SPUs as well as 128 TAUs 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 380 2G 190 Watts
Difference: 70 Watts (58%)

Memory Bandwidth

Performance-wise, the Radeon RX 470 should theoretically be a bit better than the Radeon R9 380 2G in general. (explain)

Radeon RX 470 211200 MB/sec
Radeon R9 380 2G 182400 MB/sec
Difference: 28800 (16%)

Texel Rate

The Radeon RX 470 is a small bit (about 9%) faster with regards to AF than the Radeon R9 380 2G. (explain)

Radeon RX 470 118528 Mtexels/sec
Radeon R9 380 2G 108640 Mtexels/sec
Difference: 9888 (9%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 380 2G is superior to the Radeon RX 470, not by a very large margin though. (explain)

Radeon R9 380 2G 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 2G

Radeon RX 470

Specifications

Display Specifications

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Model Radeon R9 380 2G Radeon RX 470
Manufacturer AMD AMD
Year June 2015 August 2016
Code Name Antigua PRO Polaris 10
Memory 2048 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 largest amount of data (in units of MB per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units of the card by the core 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 applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Radeon R9 380 2G

Radeon RX 470

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