Radeon HD 7870 XT vs Radeon RX 6600

Intro

Compare those specifications to the Radeon RX 6600, which comes with GPU core 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 Stream Processors, 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

Performance-wise, the Radeon RX 6600 should in theory be a bit better 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 should be much (approximately 105%) faster with regards to 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 will be a lot (approximately 252%) more effective at full screen anti-aliasing than the Radeon HD 7870 XT, and also will be capable of handling higher resolutions without losing too much performance. (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 (in units of megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR RAM, the result should 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 AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number 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 in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in a 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 sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.