Radeon HD 7950 vs Radeon RX 6600 XT

Intro

Compare that to the Radeon RX 6600 XT, which has a GPU core clock 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 Stream Processors, 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

In theory, the Radeon RX 6600 XT will be 9% quicker than the Radeon HD 7950 overall, because of its higher bandwidth. (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 a lot (more or less 181%) faster with regards to texture 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 AA than the Radeon HD 7950, and also will be capable of handling higher resolutions while still performing well. (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 max amount of data (measured in megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock 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 fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.