Radeon HD 7870 vs Radeon RX 6700 XT

Intro

Compare those specs to the Radeon RX 6700 XT, which has GPU core speed of 2321 MHz, and (Unknown) MB of GDDR6 memory running at 2000 MHz through a 192-bit bus. It also features 2560 Stream Processors, 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 6700 XT		230 Watts
	Difference: 55 Watts (31%)

Memory Bandwidth

In theory, the Radeon RX 6700 XT should be a lot faster than the Radeon HD 7870 in general. (explain)

Radeon RX 6700 XT		393216 MB/sec
Radeon HD 7870		153600 MB/sec
	Difference: 239616 (156%)

Texel Rate

The Radeon RX 6700 XT is quite a bit (approximately 364%) better at AF than the Radeon HD 7870. (explain)

Radeon RX 6700 XT		371360 Mtexels/sec
Radeon HD 7870		80000 Mtexels/sec
	Difference: 291360 (364%)

Pixel Rate

The Radeon RX 6700 XT is quite a bit (more or less 364%) faster with regards to anti-aliasing than the Radeon HD 7870, and will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon RX 6700 XT		148544 Mpixels/sec
Radeon HD 7870		32000 Mpixels/sec
	Difference: 116544 (364%)

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

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the 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 are applied per second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, 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 the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.