Radeon HD 7950 3GB vs Radeon RX 6600 XT

Intro

Compare all that to the Radeon RX 6600 XT, which makes use of a 7 nm design. AMD has clocked the core speed at 1968 MHz. The GDDR6 RAM works at a frequency of 2000 MHz on this particular card. It features 2048 SPUs as well as 128 Texture Address Units and 64 Rasterization Operator 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 3GB		200 Watts
	Difference: 40 Watts (25%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6600 XT should be 9% quicker than the Radeon HD 7950 3GB in general, due to its greater data rate. (explain)

Radeon RX 6600 XT		262144 MB/sec
Radeon HD 7950 3GB		240000 MB/sec
	Difference: 22144 (9%)

Texel Rate

The Radeon RX 6600 XT will be a lot (approximately 181%) better at texture filtering than the Radeon HD 7950 3GB. (explain)

Radeon RX 6600 XT		251904 Mtexels/sec
Radeon HD 7950 3GB		89600 Mtexels/sec
	Difference: 162304 (181%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon RX 6600 XT is superior to the Radeon HD 7950 3GB, by a large margin. (explain)

Radeon RX 6600 XT		125952 Mpixels/sec
Radeon HD 7950 3GB		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 largest amount of data (in units of megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.