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Radeon HD 7870 XT vs Radeon RX 480 4GB

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 specific card. It features 1536 SPUs along with 96 Texture Address Units and 32 Rasterization Operator Units.

Compare those specifications to the Radeon RX 480 4GB, which has a core clock speed of 1120 MHz and a GDDR5 memory speed of 1750 MHz. It also makes use of a 256-bit bus, and uses a 14 nm design. It is comprised of 2304 SPUs, 144 TAUs, and 32 ROPs.

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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.

Ethereum Mining Hash Rate

Radeon RX 480 4GB 25 Mh/s
Radeon HD 7870 XT 15 Mh/s
Difference: 10 (67%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480 4GB 150 Watts
Radeon HD 7870 XT 185 Watts
Difference: 35 Watts (23%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 480 4GB should be a little bit faster than the Radeon HD 7870 XT overall. (explain)

Radeon RX 480 4GB 229376 MB/sec
Radeon HD 7870 XT 192000 MB/sec
Difference: 37376 (19%)

Texel Rate

The Radeon RX 480 4GB should be a lot (more or less 82%) faster with regards to texture filtering than the Radeon HD 7870 XT. (explain)

Radeon RX 480 4GB 161280 Mtexels/sec
Radeon HD 7870 XT 88800 Mtexels/sec
Difference: 72480 (82%)

Pixel Rate

The Radeon RX 480 4GB is much (about 21%) faster with regards to AA than the Radeon HD 7870 XT, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon RX 480 4GB 35840 Mpixels/sec
Radeon HD 7870 XT 29600 Mpixels/sec
Difference: 6240 (21%)

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

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Radeon RX 480 4GB

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 RX 480 4GB
Manufacturer AMD AMD
Year November 2012 June 2016
Code Name Tahiti LE Polaris 10
Memory 2048 MB 4096 MB
Core Speed 925 MHz 1120 MHz
Memory Speed 6000 MHz 7000 MHz
Power (Max TDP) 185 watts 150 watts
Bandwidth 192000 MB/sec 229376 MB/sec
Texel Rate 88800 Mtexels/sec 161280 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 35840 Mpixels/sec
Unified Shaders 1536 2304
Texture Mapping Units 96 144
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 14 nm
Transistors 4313 million 5700 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 12.0
OpenGL Version OpenGL 4.3 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, the result should 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 amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units by the core 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 in one second.

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

Display Prices

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Radeon HD 7870 XT

Amazon.com

Check prices at:

Radeon RX 480 4GB

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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