Radeon HD 7970 vs Radeon RX 6650 XT

Intro

Compare those specifications to the Radeon RX 6650 XT, which features a clock speed of 2055 MHz and a GDDR6 memory frequency of 2190 MHz. It also features a 128-bit bus, and makes use of a 7 nm design. It features 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 7970		250 Watts
	Difference: 74 Watts (42%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6650 XT should theoretically be a bit better than the Radeon HD 7970 overall. (explain)

Radeon RX 6650 XT		287072 MB/sec
Radeon HD 7970		264000 MB/sec
	Difference: 23072 (9%)

Texel Rate

The Radeon RX 6650 XT should be a lot (more or less 122%) faster with regards to texture filtering than the Radeon HD 7970. (explain)

Radeon RX 6650 XT		263040 Mtexels/sec
Radeon HD 7970		118400 Mtexels/sec
	Difference: 144640 (122%)

Pixel Rate

The Radeon RX 6650 XT should be much (about 344%) faster with regards to anti-aliasing than the Radeon HD 7970, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon RX 6650 XT		131520 Mpixels/sec
Radeon HD 7970		29600 Mpixels/sec
	Difference: 101920 (344%)

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 (counted in MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the 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 most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of 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 fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.