Radeon HD 7790 vs Radeon RX 6650 XT

Intro

Compare those specs to the Radeon RX 6650 XT, which has clock speeds of 2055 MHz on the GPU, and 2190 MHz on the 8192 MB of GDDR6 RAM. It features 2048 SPUs as well as 128 Texture Address Units and 64 Rasterization Operator Units.

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

Theoretically speaking, the Radeon RX 6650 XT should be 199% quicker than the Radeon HD 7790 in general, because of its higher 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 quite a bit (approximately 370%) better at anisotropic 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

The Radeon RX 6650 XT should be quite a bit (approximately 722%) more effective at anti-aliasing than the Radeon HD 7790, and will be capable of handling higher screen resolutions without losing too much performance. (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: Bandwidth is the largest amount of information (counted in MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. 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 quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.