Radeon RX 6650 XT vs Radeon RX 7900 XT

Intro

Compare that to the Radeon RX 7900 XT, which uses a 5 nm design. AMD has clocked the core frequency at 1500 MHz. The GDDR6 memory works at a speed of 2500 MHz on this specific model. It features 5376 SPUs along with 336 TAUs and 192 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6650 XT		176 Watts
Radeon RX 7900 XT		300 Watts
	Difference: 124 Watts (70%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 7900 XT should be 185% quicker than the Radeon RX 6650 XT in general, due to its greater bandwidth. (explain)

Radeon RX 7900 XT		819200 MB/sec
Radeon RX 6650 XT		287072 MB/sec
	Difference: 532128 (185%)

Texel Rate

The Radeon RX 7900 XT is quite a bit (approximately 92%) faster with regards to AF than the Radeon RX 6650 XT. (explain)

Radeon RX 7900 XT		504000 Mtexels/sec
Radeon RX 6650 XT		263040 Mtexels/sec
	Difference: 240960 (92%)

Pixel Rate

The Radeon RX 7900 XT will be a lot (approximately 119%) better at AA than the Radeon RX 6650 XT, and also will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon RX 7900 XT		288000 Mpixels/sec
Radeon RX 6650 XT		131520 Mpixels/sec
	Difference: 156480 (119%)

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 max amount of information (measured in MB per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 number of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 maximum fill rate.