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Radeon HD 7870 vs Radeon RX 5700 XT 50th Anniversary Edition

Intro

The Radeon HD 7870 uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM is set to run at a frequency of 1200 MHz on this model. It features 1280 SPUs along with 80 Texture Address Units and 32 ROPs.

Compare all that to the Radeon RX 5700 XT 50th Anniversary Edition, which features GPU core speed of 1680 MHz, and 8096 MB of GDDR6 memory set to run at 1750 MHz through a 256-bit bus. It also features 2560 SPUs, 160 Texture Address Units, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 175 Watts
Radeon RX 5700 XT 50th Anniversary Edition 235 Watts
Difference: 60 Watts (34%)

Memory Bandwidth

The Radeon RX 5700 XT 50th Anniversary Edition, in theory, should be a lot faster than the Radeon HD 7870 overall. (explain)

Radeon RX 5700 XT 50th Anniversary Edition 458752 MB/sec
Radeon HD 7870 153600 MB/sec
Difference: 305152 (199%)

Texel Rate

The Radeon RX 5700 XT 50th Anniversary Edition will be much (approximately 236%) faster with regards to texture filtering than the Radeon HD 7870. (explain)

Radeon RX 5700 XT 50th Anniversary Edition 268800 Mtexels/sec
Radeon HD 7870 80000 Mtexels/sec
Difference: 188800 (236%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon RX 5700 XT 50th Anniversary Edition is superior to the Radeon HD 7870, by a large margin. (explain)

Radeon RX 5700 XT 50th Anniversary Edition 107520 Mpixels/sec
Radeon HD 7870 32000 Mpixels/sec
Difference: 75520 (236%)

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 5700 XT 50th Anniversary Edition

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 5700 XT 50th Anniversary Edition
Manufacturer AMD AMD
Year March 2012 July 2019
Code Name Pitcairn XT Navi 10
Memory 2048 MB 8096 MB
Core Speed 1000 MHz 1680 MHz
Memory Speed 4800 MHz 3500 GB/s
Power (Max TDP) 175 watts 235 watts
Bandwidth 153600 MB/sec 458752 MB/sec
Texel Rate 80000 Mtexels/sec 268800 Mtexels/sec
Pixel Rate 32000 Mpixels/sec 107520 Mpixels/sec
Unified Shaders 1280 2560
Texture Mapping Units 80 160
Render Output Units 32 64
Bus Type GDDR5 GDDR6
Bus Width 256-bit 256-bit
Fab Process 28 nm 7 nm
Transistors 2800 million 10300 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 largest amount of information (in units of MB per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 can be processed per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated 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 drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 7870

Amazon.com

Check prices at:

Radeon RX 5700 XT 50th Anniversary Edition

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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