Radeon RX 6650 XT vs Radeon RX 6800 XT

Intro

Compare that to the Radeon RX 6800 XT, which has GPU clock speed of 1825 MHz, and 16384 MB of GDDR6 RAM running at 2000 MHz through a 256-bit bus. It also features 4608 SPUs, 288 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 6800 XT		300 Watts
	Difference: 124 Watts (70%)

Memory Bandwidth

Performance-wise, the Radeon RX 6800 XT should theoretically be quite a bit superior to the Radeon RX 6650 XT in general. (explain)

Radeon RX 6800 XT		524288 MB/sec
Radeon RX 6650 XT		287072 MB/sec
	Difference: 237216 (83%)

Texel Rate

The Radeon RX 6800 XT should be a lot (approximately 100%) better at AF than the Radeon RX 6650 XT. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
Radeon RX 6650 XT		263040 Mtexels/sec
	Difference: 262560 (100%)

Pixel Rate

The Radeon RX 6800 XT is much (about 78%) faster with regards to anti-aliasing than the Radeon RX 6650 XT, and will be able to handle higher resolutions while still performing well. (explain)

Radeon RX 6800 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 max amount of information (in units of megabytes per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.