GeForce GTX 870M vs Radeon RX 6900 XT

Intro

Compare those specs to the Radeon RX 6900 XT, which has GPU core speed of 1825 MHz, and 16384 MB of GDDR6 memory set to run at 2000 MHz through a 256-bit bus. It also is made up of 5120 Stream Processors, 320 Texture Address Units, and 128 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M		110 Watts
Radeon RX 6900 XT		300 Watts
	Difference: 190 Watts (173%)

Memory Bandwidth

In theory, the Radeon RX 6900 XT will be 446% faster than the GeForce GTX 870M in general, because of its higher bandwidth. (explain)

Radeon RX 6900 XT		524288 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 428288 (446%)

Texel Rate

The Radeon RX 6900 XT will be quite a bit (more or less 454%) more effective at anisotropic filtering than the GeForce GTX 870M. (explain)

Radeon RX 6900 XT		584000 Mtexels/sec
GeForce GTX 870M		105392 Mtexels/sec
	Difference: 478608 (454%)

Pixel Rate

The Radeon RX 6900 XT will be much (more or less 934%) faster with regards to AA than the GeForce GTX 870M, and should be able to handle higher resolutions more effectively. (explain)

Radeon RX 6900 XT		233600 Mpixels/sec
GeForce GTX 870M		22584 Mpixels/sec
	Difference: 211016 (934%)

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 (in units of MB per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number of texture units 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 processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core speed of the card. 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 of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.