Radeon HD 7870 XT vs Radeon RX 6600

Intro

Compare those specifications to the Radeon RX 6600, which comes with clock speeds of 1626 MHz on the GPU, and 1750 MHz on the 8192 MB of GDDR6 memory. It features 1792 SPUs as well as 112 Texture Address Units 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 XT		185 Watts
	Difference: 53 Watts (40%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6600 should in theory be a bit superior to the Radeon HD 7870 XT in general. (explain)

Radeon RX 6600		229376 MB/sec
Radeon HD 7870 XT		192000 MB/sec
	Difference: 37376 (19%)

Texel Rate

The Radeon RX 6600 should be a lot (about 105%) more effective at texture filtering than the Radeon HD 7870 XT. (explain)

Radeon RX 6600		182112 Mtexels/sec
Radeon HD 7870 XT		88800 Mtexels/sec
	Difference: 93312 (105%)

Pixel Rate

The Radeon RX 6600 is much (about 252%) more effective at full screen anti-aliasing than the Radeon HD 7870 XT, and also able to handle higher screen resolutions more effectively. (explain)

Radeon RX 6600		104064 Mpixels/sec
Radeon HD 7870 XT		29600 Mpixels/sec
	Difference: 74464 (252%)

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 information (counted in MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of 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.