Radeon HD 7870 vs Radeon RX 6600

Intro

Compare those specs to the Radeon RX 6600, which comes with core clock speeds of 1626 MHz on the GPU, and 1750 MHz on the 8192 MB of GDDR6 memory. It features 1792 SPUs along with 112 TAUs and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600		132 Watts
Radeon HD 7870		175 Watts
	Difference: 43 Watts (33%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6600 should theoretically be much superior to the Radeon HD 7870 overall. (explain)

Radeon RX 6600		229376 MB/sec
Radeon HD 7870		153600 MB/sec
	Difference: 75776 (49%)

Texel Rate

The Radeon RX 6600 is quite a bit (approximately 128%) more effective at AF than the Radeon HD 7870. (explain)

Radeon RX 6600		182112 Mtexels/sec
Radeon HD 7870		80000 Mtexels/sec
	Difference: 102112 (128%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 6600 is superior to the Radeon HD 7870, by a large margin. (explain)

Radeon RX 6600		104064 Mpixels/sec
Radeon HD 7870		32000 Mpixels/sec
	Difference: 72064 (225%)

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 maximum amount of data (counted in MB per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total texture units by the core 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure 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 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 get to the maximum fill rate.