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Radeon HD 7870 vs Radeon R9 380 2G

Intro

The Radeon HD 7870 comes with a GPU core speed of 1000 MHz, and the 2048 MB of GDDR5 RAM is set to run at 1200 MHz through a 256-bit bus. It also is made up of 1280 Stream Processors, 80 TAUs, and 32 Raster Operation Units.

Compare those specifications to the Radeon R9 380 2G, which has core speeds of 970 MHz on the GPU, and 1425 MHz on the 2048 MB of GDDR5 memory. It features 1792 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 380 2G 8850 points
Radeon HD 7870 6230 points
Difference: 2620 (42%)

Ethereum Mining Hash Rate

Radeon R9 380 2G 19 Mh/s
Radeon HD 7870 16 Mh/s
Difference: 3 (19%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 175 Watts
Radeon R9 380 2G 190 Watts
Difference: 15 Watts (9%)

Memory Bandwidth

Theoretically, the Radeon R9 380 2G should perform a bit faster than the Radeon HD 7870 overall. (explain)

Radeon R9 380 2G 182400 MB/sec
Radeon HD 7870 153600 MB/sec
Difference: 28800 (19%)

Texel Rate

The Radeon R9 380 2G should be much (about 36%) more effective at AF than the Radeon HD 7870. (explain)

Radeon R9 380 2G 108640 Mtexels/sec
Radeon HD 7870 80000 Mtexels/sec
Difference: 28640 (36%)

Pixel Rate

The Radeon HD 7870 should be a small bit (more or less 3%) more effective at FSAA than the Radeon R9 380 2G, and also will be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 7870 32000 Mpixels/sec
Radeon R9 380 2G 31040 Mpixels/sec
Difference: 960 (3%)

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 HD 7870

Amazon.com

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Radeon R9 380 2G

Amazon.com

Check prices at:

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 HD 7870 Radeon R9 380 2G
Manufacturer AMD AMD
Year March 2012 June 2015
Code Name Pitcairn XT Antigua PRO
Memory 2048 MB 2048 MB
Core Speed 1000 MHz 970 MHz
Memory Speed 4800 MHz 5700 MHz
Power (Max TDP) 175 watts 190 watts
Bandwidth 153600 MB/sec 182400 MB/sec
Texel Rate 80000 Mtexels/sec 108640 Mtexels/sec
Pixel Rate 32000 Mpixels/sec 31040 Mpixels/sec
Unified Shaders 1280 1792
Texture Mapping Units 80 112
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 2800 million 5000 million
Bus PCIe 3.0 x16 PCIe 3.0 ×16
DirectX Version DirectX 11.1 DirectX 12.0
OpenGL Version OpenGL 4.2 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

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

Display Prices

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Radeon HD 7870

Amazon.com

Check prices at:

Radeon R9 380 2G

Amazon.com

Check prices at:

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.

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