Radeon HD 7850 vs Radeon RX 6600 XT

Intro

Compare all of that to the Radeon RX 6600 XT, which has GPU core speed of 1968 MHz, and 8192 MB of GDDR6 memory set to run at 2000 MHz through a 128-bit bus. It also is made up of 2048 SPUs, 128 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 7850		130 Watts
Radeon RX 6600 XT		160 Watts
	Difference: 30 Watts (23%)

Memory Bandwidth

In theory, the Radeon RX 6600 XT is 71% faster than the Radeon HD 7850 overall, because of its higher bandwidth. (explain)

Radeon RX 6600 XT		262144 MB/sec
Radeon HD 7850		153600 MB/sec
	Difference: 108544 (71%)

Texel Rate

The Radeon RX 6600 XT is quite a bit (more or less 358%) better at anisotropic filtering than the Radeon HD 7850. (explain)

Radeon RX 6600 XT		251904 Mtexels/sec
Radeon HD 7850		55040 Mtexels/sec
	Difference: 196864 (358%)

Pixel Rate

The Radeon RX 6600 XT will be quite a bit (more or less 358%) faster with regards to AA than the Radeon HD 7850, and also should be capable of handling higher resolutions better. (explain)

Radeon RX 6600 XT		125952 Mpixels/sec
Radeon HD 7850		27520 Mpixels/sec
	Difference: 98432 (358%)

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: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.