Radeon HD 7950 3GB vs Radeon RX 6650 XT

Intro

Compare that to the Radeon RX 6650 XT, which comes with 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 is comprised of 2048 SPUs, 128 TAUs, 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 3GB		200 Watts
	Difference: 24 Watts (14%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6650 XT will be 20% faster than the Radeon HD 7950 3GB in general, due to its higher bandwidth. (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 will be quite a bit (approximately 194%) better at AF 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

The Radeon RX 6650 XT should be quite a bit (approximately 414%) better at FSAA than the Radeon HD 7950 3GB, and able to handle higher resolutions without slowing down too much. (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: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.