Radeon HD 7870 XT vs Radeon RX 6600

Intro

Compare that to the Radeon RX 6600, which has GPU clock speed of 1626 MHz, and 8192 MB of GDDR6 RAM set to run at 1750 MHz through a 128-bit bus. It also is comprised of 1792 SPUs, 112 TAUs, and 64 ROPs.

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

The Radeon RX 6600 should theoretically be a little bit faster than 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 is much (about 105%) better 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

If using high levels of AA is important to you, then the Radeon RX 6600 is superior to the Radeon HD 7870 XT, by a large margin. (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 data (measured in megabytes per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR memory, the result should 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 amount of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.