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Radeon HD 7870 vs Radeon RX 5500

Intro

The Radeon HD 7870 has a GPU clock speed of 1000 MHz, and the 2048 MB of GDDR5 RAM runs at 1200 MHz through a 256-bit bus. It also is comprised of 1280 Stream Processors, 80 TAUs, and 32 Raster Operation Units.

Compare that to the Radeon RX 5500, which comes with GPU clock speed of 1670 MHz, and 4096 MB of GDDR6 memory set to run at 1750 MHz through a 128-bit bus. It also features 1408 Stream Processors, 88 Texture Address Units, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5500 150 Watts
Radeon HD 7870 175 Watts
Difference: 25 Watts (17%)

Memory Bandwidth

As far as performance goes, the Radeon RX 5500 should in theory be quite a bit better than the Radeon HD 7870 overall. (explain)

Radeon RX 5500 229376 MB/sec
Radeon HD 7870 153600 MB/sec
Difference: 75776 (49%)

Texel Rate

The Radeon RX 5500 will be quite a bit (more or less 84%) more effective at AF than the Radeon HD 7870. (explain)

Radeon RX 5500 146960 Mtexels/sec
Radeon HD 7870 80000 Mtexels/sec
Difference: 66960 (84%)

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 5500 is superior to the Radeon HD 7870, by far. (explain)

Radeon RX 5500 53440 Mpixels/sec
Radeon HD 7870 32000 Mpixels/sec
Difference: 21440 (67%)

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

Amazon.com

Check prices at:

Radeon RX 5500

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 Radeon RX 5500
Manufacturer AMD AMD
Year March 2012 October 2019
Code Name Pitcairn XT Navi 14 XT
Memory 2048 MB 4096 MB
Core Speed 1000 MHz 1670 MHz
Memory Speed 4800 MHz 3500 GB/s
Power (Max TDP) 175 watts 150 watts
Bandwidth 153600 MB/sec 229376 MB/sec
Texel Rate 80000 Mtexels/sec 146960 Mtexels/sec
Pixel Rate 32000 Mpixels/sec 53440 Mpixels/sec
Unified Shaders 1280 1408
Texture Mapping Units 80 88
Render Output Units 32 32
Bus Type GDDR5 GDDR6
Bus Width 256-bit 128-bit
Fab Process 28 nm 7 nm
Transistors 2800 million 6400 million
Bus PCIe 3.0 x16 PCIe 4.0 ×16
DirectX Version DirectX 11.1 DirectX 12
OpenGL Version OpenGL 4.2 OpenGL 4.6

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few 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

Hide Prices

Radeon HD 7870

Amazon.com

Check prices at:

Radeon RX 5500

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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