Radeon RX 6650 XT vs Radeon RX 6900 XT

Intro

Compare those specs to the Radeon RX 6900 XT, which features a core clock frequency of 1825 MHz and a GDDR6 memory speed of 2000 MHz. It also makes use of a 256-bit bus, and makes use of a 7 nm design. It is comprised of 5120 SPUs, 320 Texture Address Units, and 128 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6650 XT		176 Watts
Radeon RX 6900 XT		300 Watts
	Difference: 124 Watts (70%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6900 XT should in theory be quite a bit better than the Radeon RX 6650 XT in general. (explain)

Radeon RX 6900 XT		524288 MB/sec
Radeon RX 6650 XT		287072 MB/sec
	Difference: 237216 (83%)

Texel Rate

The Radeon RX 6900 XT is a lot (approximately 122%) better at anisotropic filtering than the Radeon RX 6650 XT. (explain)

Radeon RX 6900 XT		584000 Mtexels/sec
Radeon RX 6650 XT		263040 Mtexels/sec
	Difference: 320960 (122%)

Pixel Rate

The Radeon RX 6900 XT should be a lot (about 78%) faster with regards to full screen anti-aliasing than the Radeon RX 6650 XT, and able to handle higher resolutions without slowing down too much. (explain)

Radeon RX 6900 XT		233600 Mpixels/sec
Radeon RX 6650 XT		131520 Mpixels/sec
	Difference: 102080 (78%)

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 maximum amount of data (measured in MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR RAM, the result should 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 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 in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels 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 amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.