Radeon HD 7790 vs Radeon RX 6500 XT

Intro

Compare those specs to the Radeon RX 6500 XT, which comes with a clock speed of 2200 MHz and a GDDR6 memory speed of 2250 MHz. It also makes use of a 64-bit bus, and uses a 6 nm design. It features 1024 SPUs, 64 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon RX 6500 XT		107 Watts
	Difference: 22 Watts (26%)

Memory Bandwidth

In theory, the Radeon RX 6500 XT should be 54% quicker than the Radeon HD 7790 overall, due to its greater data rate. (explain)

Radeon RX 6500 XT		147456 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 51456 (54%)

Texel Rate

The Radeon RX 6500 XT is much (approximately 151%) more effective at anisotropic filtering than the Radeon HD 7790. (explain)

Radeon RX 6500 XT		140800 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 84800 (151%)

Pixel Rate

The Radeon RX 6500 XT is a lot (more or less 340%) better at AA than the Radeon HD 7790, and also will be able to handle higher resolutions without slowing down too much. (explain)

Radeon RX 6500 XT		70400 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 54400 (340%)

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 transferred across the external memory interface in one second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.