GeForce 820M vs Radeon RX 6900 XT

Intro

Compare all of that to the Radeon RX 6900 XT, which has a GPU core clock speed of 1825 MHz, and 16384 MB of GDDR6 RAM set to run at 2000 MHz through a 256-bit bus. It also features 5120 Stream Processors, 320 TAUs, and 128 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
Radeon RX 6900 XT		300 Watts
	Difference: 285 Watts (1900%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6900 XT will be 3177% faster than the GeForce 820M overall, because of its greater data rate. (explain)

Radeon RX 6900 XT		524288 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 508288 (3177%)

Texel Rate

The Radeon RX 6900 XT will be quite a bit (approximately 4976%) more effective at texture filtering than the GeForce 820M. (explain)

Radeon RX 6900 XT		584000 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 572496 (4976%)

Pixel Rate

The Radeon RX 6900 XT should be quite a bit (approximately 8022%) faster with regards to AA than the GeForce 820M, and also should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon RX 6900 XT		233600 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 230724 (8022%)

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 max amount of data (measured in megabytes per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. 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 quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.