Radeon HD 7790 vs Radeon RX 6600 XT

Intro

Compare those specifications to the Radeon RX 6600 XT, which uses a 7 nm design. AMD has clocked the core speed at 1968 MHz. The GDDR6 RAM works at a speed of 2000 MHz on this card. It features 2048 SPUs as well as 128 Texture Address Units and 64 ROPs.

Display Graphs

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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

As far as performance goes, the Radeon RX 6600 XT should theoretically be a lot better 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 much (approximately 350%) better 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 a high resolution 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: Memory bandwidth is the largest amount of data (measured in MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.