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Radeon HD 7870 XT vs Radeon R9 380 4G

Intro

The Radeon HD 7870 XT uses a 28 nm design. AMD has clocked the core frequency at 925 MHz. The GDDR5 RAM works at a frequency of 1500 MHz on this model. It features 1536 SPUs as well as 96 Texture Address Units and 32 ROPs.

Compare all of that to the Radeon R9 380 4G, which features core speeds of 970 MHz on the GPU, and 1425 MHz on the 4096 MB of GDDR5 RAM. It features 1792 SPUs along with 112 TAUs and 32 Rasterization Operator Units.

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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 4G 8837 points
Radeon HD 7870 XT 6390 points
Difference: 2447 (38%)

Ethereum Mining Hash Rate

Radeon R9 380 4G 21 Mh/s
Radeon HD 7870 XT 15 Mh/s
Difference: 6 (40%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 XT 185 Watts
Radeon R9 380 4G 190 Watts
Difference: 5 Watts (3%)

Memory Bandwidth

Performance-wise, the Radeon HD 7870 XT should in theory be just a bit superior to the Radeon R9 380 4G overall. (explain)

Radeon HD 7870 XT 192000 MB/sec
Radeon R9 380 4G 182400 MB/sec
Difference: 9600 (5%)

Texel Rate

The Radeon R9 380 4G will be much (more or less 22%) better at anisotropic filtering than the Radeon HD 7870 XT. (explain)

Radeon R9 380 4G 108640 Mtexels/sec
Radeon HD 7870 XT 88800 Mtexels/sec
Difference: 19840 (22%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 380 4G is superior to the Radeon HD 7870 XT, though not by far. (explain)

Radeon R9 380 4G 31040 Mpixels/sec
Radeon HD 7870 XT 29600 Mpixels/sec
Difference: 1440 (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 HD 7870 XT

Amazon.com

Check prices at:

Radeon R9 380 4G

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 XT Radeon R9 380 4G
Manufacturer AMD AMD
Year November 2012 June 2015
Code Name Tahiti LE Antigua PRO
Memory 2048 MB 4096 MB
Core Speed 925 MHz 970 MHz
Memory Speed 6000 MHz 5700 MHz
Power (Max TDP) 185 watts 190 watts
Bandwidth 192000 MB/sec 182400 MB/sec
Texel Rate 88800 Mtexels/sec 108640 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 31040 Mpixels/sec
Unified Shaders 1536 1792
Texture Mapping Units 96 112
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 4313 million 5000 million
Bus PCIe 3.0 x16 PCIe 3.0 ×16
DirectX Version DirectX 11.1 DirectX 12.0
OpenGL Version OpenGL 4.3 OpenGL 4.5

Memory Bandwidth: Bandwidth is the largest amount of information (measured in MB per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 are applied in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon HD 7870 XT

Amazon.com

Check prices at:

Radeon R9 380 4G

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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