Radeon HD 7790 vs Radeon RX 6650 XT

Intro

Compare those specs to the Radeon RX 6650 XT, which has GPU core speed of 2055 MHz, and 8192 MB of GDDR6 RAM set to run at 2190 MHz through a 128-bit bus. It also is comprised of 2048 SPUs, 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 6650 XT		176 Watts
	Difference: 91 Watts (107%)

Memory Bandwidth

In theory, the Radeon RX 6650 XT should be 199% quicker than the Radeon HD 7790 overall, due to its greater bandwidth. (explain)

Radeon RX 6650 XT		287072 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 191072 (199%)

Texel Rate

The Radeon RX 6650 XT is much (approximately 370%) faster with regards to texture filtering than the Radeon HD 7790. (explain)

Radeon RX 6650 XT		263040 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 207040 (370%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon RX 6650 XT is a better choice, by far. (explain)

Radeon RX 6650 XT		131520 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 115520 (722%)

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 past the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. 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 are processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its 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 - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.