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Radeon HD 7870 XT vs Radeon R9 380 2G

Intro

The Radeon HD 7870 XT makes use of 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 TAUs and 32 Rasterization Operator Units.

Compare that to the Radeon R9 380 2G, which features a GPU core clock speed of 970 MHz, and 2048 MB of GDDR5 memory set to run at 1425 MHz through a 256-bit bus. It also features 1792 Stream Processors, 112 TAUs, and 32 Raster Operation 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 2G 8850 points
Radeon HD 7870 XT 6390 points
Difference: 2460 (38%)

Ethereum Mining Hash Rate

Radeon R9 380 2G 19 Mh/s
Radeon HD 7870 XT 15 Mh/s
Difference: 4 (27%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 XT 185 Watts
Radeon R9 380 2G 190 Watts
Difference: 5 Watts (3%)

Memory Bandwidth

In theory, the Radeon HD 7870 XT will be 5% faster than the Radeon R9 380 2G overall, because of its greater bandwidth. (explain)

Radeon HD 7870 XT 192000 MB/sec
Radeon R9 380 2G 182400 MB/sec
Difference: 9600 (5%)

Texel Rate

The Radeon R9 380 2G will be quite a bit (about 22%) faster with regards to texture filtering than the Radeon HD 7870 XT. (explain)

Radeon R9 380 2G 108640 Mtexels/sec
Radeon HD 7870 XT 88800 Mtexels/sec
Difference: 19840 (22%)

Pixel Rate

The Radeon R9 380 2G should be a little bit (more or less 5%) faster with regards to AA than the Radeon HD 7870 XT, and also capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 380 2G 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 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 XT Radeon R9 380 2G
Manufacturer AMD AMD
Year November 2012 June 2015
Code Name Tahiti LE Antigua PRO
Memory 2048 MB 2048 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 data (measured in megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it must 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the 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 most pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Radeon HD 7870 XT

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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