Radeon HD 7790 vs Radeon RX 6900 XT

Intro

Compare all of that to the Radeon RX 6900 XT, which features core speeds of 1825 MHz on the GPU, and 2000 MHz on the 16384 MB of GDDR6 RAM. It features 5120 SPUs as well as 320 TAUs and 128 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon RX 6900 XT		300 Watts
	Difference: 215 Watts (253%)

Memory Bandwidth

Performance-wise, the Radeon RX 6900 XT should theoretically be quite a bit superior to the Radeon HD 7790 overall. (explain)

Radeon RX 6900 XT		524288 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 428288 (446%)

Texel Rate

The Radeon RX 6900 XT will be a lot (more or less 943%) faster with regards to texture filtering than the Radeon HD 7790. (explain)

Radeon RX 6900 XT		584000 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 528000 (943%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX 6900 XT is the winner, by a large margin. (explain)

Radeon RX 6900 XT		233600 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 217600 (1360%)

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 maximum amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.