Radeon HD 7950 vs Radeon RX 6650 XT

Intro

Compare those specs to the Radeon RX 6650 XT, which features a clock frequency of 2055 MHz and a GDDR6 memory frequency of 2190 MHz. It also makes use of a 128-bit memory bus, and makes use of a 7 nm design. It is comprised of 2048 SPUs, 128 Texture Address Units, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6650 XT		176 Watts
Radeon HD 7950		200 Watts
	Difference: 24 Watts (14%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6650 XT is 20% quicker than the Radeon HD 7950 in general, due to its greater bandwidth. (explain)

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

Texel Rate

The Radeon RX 6650 XT is a lot (more or less 194%) faster with regards to texture filtering than the Radeon HD 7950. (explain)

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

Pixel Rate

The Radeon RX 6650 XT is much (more or less 414%) more effective at FSAA than the Radeon HD 7950, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon RX 6650 XT		131520 Mpixels/sec
Radeon HD 7950		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: 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 card's interface width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the 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 the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.