Radeon HD 7790 vs Radeon RX 6600 XT

Intro

Compare those specs to the Radeon RX 6600 XT, which has a clock frequency of 1968 MHz and a GDDR6 memory speed of 2000 MHz. It also features a 128-bit bus, and makes use of a 7 nm design. It is comprised of 2048 SPUs, 128 Texture Address Units, and 64 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon RX 6600 XT		160 Watts
	Difference: 75 Watts (88%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6600 XT should perform quite a bit faster than the Radeon HD 7790 overall. (explain)

Radeon RX 6600 XT		262144 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 166144 (173%)

Texel Rate

The Radeon RX 6600 XT will be quite a bit (more or less 350%) more effective at texture filtering than the Radeon HD 7790. (explain)

Radeon RX 6600 XT		251904 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 195904 (350%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 6600 XT is superior to the Radeon HD 7790, by far. (explain)

Radeon RX 6600 XT		125952 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 109952 (687%)

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 information (in units of megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 can be applied in one second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.