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Radeon HD 7870 XT vs Radeon R9 380 2G

Intro

The Radeon HD 7870 XT has core speeds of 925 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs as well as 96 Texture Address Units and 32 ROPs.

Compare all of that to the Radeon R9 380 2G, which comes with a core clock frequency of 970 MHz and a GDDR5 memory speed of 1425 MHz. It also features a 256-bit bus, and uses a 28 nm design. It is made up of 1792 SPUs, 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 should perform a small bit faster than the Radeon R9 380 2G in general. (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 should be a lot (approximately 22%) faster with regards to AF 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 will be a small bit (about 5%) better at anti-aliasing than the Radeon HD 7870 XT, and should be able to handle higher resolutions better. (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: Memory bandwidth is the max amount of information (counted in MB per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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