Radeon RX 5700 XT vs Radeon RX 6900 XT

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5700 XT		225 Watts
Radeon RX 6900 XT		300 Watts
	Difference: 75 Watts (33%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6900 XT will be 14% faster than the Radeon RX 5700 XT in general, due to its greater data rate. (explain)

Radeon RX 6900 XT		524288 MB/sec
Radeon RX 5700 XT		458752 MB/sec
	Difference: 65536 (14%)

Texel Rate

The Radeon RX 6900 XT should be quite a bit (approximately 127%) faster with regards to AF than the Radeon RX 5700 XT. (explain)

Radeon RX 6900 XT		584000 Mtexels/sec
Radeon RX 5700 XT		256800 Mtexels/sec
	Difference: 327200 (127%)

Pixel Rate

The Radeon RX 6900 XT should be a lot (about 127%) faster with regards to FSAA than the Radeon RX 5700 XT, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon RX 6900 XT		233600 Mpixels/sec
Radeon RX 5700 XT		102720 Mpixels/sec
	Difference: 130880 (127%)

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 largest amount of data (counted in megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on 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 ability to reach the maximum fill rate.