Radeon HD 7950 3GB vs Radeon RX 6650 XT

Intro

Compare those specifications to the Radeon RX 6650 XT, which comes with GPU clock speed of 2055 MHz, and 8192 MB of GDDR6 RAM running at 2190 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 RX 6650 XT		176 Watts
Radeon HD 7950 3GB		200 Watts
	Difference: 24 Watts (14%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6650 XT should be a bit faster than the Radeon HD 7950 3GB overall. (explain)

Radeon RX 6650 XT		287072 MB/sec
Radeon HD 7950 3GB		240000 MB/sec
	Difference: 47072 (20%)

Texel Rate

The Radeon RX 6650 XT should be quite a bit (approximately 194%) faster with regards to anisotropic filtering than the Radeon HD 7950 3GB. (explain)

Radeon RX 6650 XT		263040 Mtexels/sec
Radeon HD 7950 3GB		89600 Mtexels/sec
	Difference: 173440 (194%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX 6650 XT is the winner, and very much so. (explain)

Radeon RX 6650 XT		131520 Mpixels/sec
Radeon HD 7950 3GB		25600 Mpixels/sec
	Difference: 105920 (414%)

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 largest amount of information (measured in MB per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.