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Radeon HD 7870 XT vs Radeon RX 5600

Intro

The Radeon HD 7870 XT comes with a GPU clock speed of 925 MHz, and the 2048 MB of GDDR5 RAM is set to run at 1500 MHz through a 256-bit bus. It also is made up of 1536 Stream Processors, 96 TAUs, and 32 ROPs.

Compare all of that to the Radeon RX 5600, which comes with a core clock speed of 1375 MHz and a GDDR6 memory speed of 1500 MHz. It also makes use of a 192-bit bus, and uses a 7 nm design. It is comprised of 2048 SPUs, 128 Texture Address Units, and 64 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5600		150 Watts
Radeon HD 7870 XT		185 Watts
	Difference: 35 Watts (23%)

Memory Bandwidth

The Radeon RX 5600 should theoretically be much faster than the Radeon HD 7870 XT overall. (explain)

Radeon RX 5600		294912 MB/sec
Radeon HD 7870 XT		192000 MB/sec
	Difference: 102912 (54%)

Texel Rate

The Radeon RX 5600 should be quite a bit (approximately 98%) more effective at anisotropic filtering than the Radeon HD 7870 XT. (explain)

Radeon RX 5600		176000 Mtexels/sec
Radeon HD 7870 XT		88800 Mtexels/sec
	Difference: 87200 (98%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon RX 5600 is the winner, and very much so. (explain)

Radeon RX 5600		88000 Mpixels/sec
Radeon HD 7870 XT		29600 Mpixels/sec
	Difference: 58400 (197%)

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

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Radeon RX 5600

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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 5600
Manufacturer	AMD	AMD
Year	November 2012	January 2020
Code Name	Tahiti LE	Navi 10 XE
Memory	2048 MB	6144 MB
Core Speed	925 MHz	1375 MHz
Memory Speed	6000 MHz	3000 GB/s
Power (Max TDP)	185 watts	150 watts
Bandwidth	192000 MB/sec	294912 MB/sec
Texel Rate	88800 Mtexels/sec	176000 Mtexels/sec
Pixel Rate	29600 Mpixels/sec	88000 Mpixels/sec
Unified Shaders	1536	2048
Texture Mapping Units	96	128
Render Output Units	32	64
Bus Type	GDDR5	GDDR6
Bus Width	256-bit	192-bit
Fab Process	28 nm	7 nm
Transistors	4313 million	10300 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 data (in units of megabytes per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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 potential to reach the maximum fill rate.

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