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Radeon HD 7870 XT vs Radeon RX 5500 XT

Intro

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

Compare all that to the Radeon RX 5500 XT, which features clock speeds of 1717 MHz on the GPU, and 1750 MHz on the 8192 MB of GDDR6 memory. It features 1408 SPUs as well as 88 TAUs and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5500 XT 130 Watts
Radeon HD 7870 XT 185 Watts
Difference: 55 Watts (42%)

Memory Bandwidth

Theoretically, the Radeon RX 5500 XT should be a little bit faster than the Radeon HD 7870 XT in general. (explain)

Radeon RX 5500 XT 229376 MB/sec
Radeon HD 7870 XT 192000 MB/sec
Difference: 37376 (19%)

Texel Rate

The Radeon RX 5500 XT is much (more or less 70%) faster with regards to anisotropic filtering than the Radeon HD 7870 XT. (explain)

Radeon RX 5500 XT 151096 Mtexels/sec
Radeon HD 7870 XT 88800 Mtexels/sec
Difference: 62296 (70%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon RX 5500 XT is the winner, and very much so. (explain)

Radeon RX 5500 XT 54944 Mpixels/sec
Radeon HD 7870 XT 29600 Mpixels/sec
Difference: 25344 (86%)

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 5500 XT

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 5500 XT
Manufacturer AMD AMD
Year November 2012 December 2019
Code Name Tahiti LE Navi 14 XTX
Memory 2048 MB 8192 MB
Core Speed 925 MHz 1717 MHz
Memory Speed 6000 MHz 3500 GB/s
Power (Max TDP) 185 watts 130 watts
Bandwidth 192000 MB/sec 229376 MB/sec
Texel Rate 88800 Mtexels/sec 151096 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 54944 Mpixels/sec
Unified Shaders 1536 1408
Texture Mapping Units 96 88
Render Output Units 32 32
Bus Type GDDR5 GDDR6
Bus Width 256-bit 128-bit
Fab Process 28 nm 7 nm
Transistors 4313 million 6400 million
Bus PCIe 3.0 x16 PCIe 4.0 ×16
DirectX Version DirectX 11.1 DirectX 12
OpenGL Version OpenGL 4.3 OpenGL 4.6

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total number of texture units 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 applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 7870 XT

Amazon.com

Check prices at:

Radeon RX 5500 XT

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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