Radeon HD 7950 vs Radeon RX 6600 XT

Intro

Compare those specifications to the Radeon RX 6600 XT, which features a clock frequency of 1968 MHz and a GDDR6 memory speed of 2000 MHz. It also uses a 128-bit bus, and uses a 7 nm design. It features 2048 SPUs, 128 TAUs, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 XT		160 Watts
Radeon HD 7950		200 Watts
	Difference: 40 Watts (25%)

Memory Bandwidth

Theoretically, the Radeon RX 6600 XT should be just a bit faster than the Radeon HD 7950 overall. (explain)

Radeon RX 6600 XT		262144 MB/sec
Radeon HD 7950		240000 MB/sec
	Difference: 22144 (9%)

Texel Rate

The Radeon RX 6600 XT is much (more or less 181%) more effective at anisotropic filtering than the Radeon HD 7950. (explain)

Radeon RX 6600 XT		251904 Mtexels/sec
Radeon HD 7950		89600 Mtexels/sec
	Difference: 162304 (181%)

Pixel Rate

The Radeon RX 6600 XT will be much (more or less 392%) faster with regards to full screen anti-aliasing than the Radeon HD 7950, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon RX 6600 XT		125952 Mpixels/sec
Radeon HD 7950		25600 Mpixels/sec
	Difference: 100352 (392%)

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 maximum amount of data (measured in MB per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 number of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units of the card by the core 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.