GeForce GT 420 vs Radeon RX 6500 XT

Intro

Compare those specs to the Radeon RX 6500 XT, which comes with a GPU core clock speed of 2200 MHz, and 4096 MB of GDDR6 RAM running at 2250 MHz through a 64-bit bus. It also is comprised of 1024 Stream Processors, 64 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420		50 Watts
Radeon RX 6500 XT		107 Watts
	Difference: 57 Watts (114%)

Memory Bandwidth

The Radeon RX 6500 XT, in theory, should be much faster than the GeForce GT 420 in general. (explain)

Radeon RX 6500 XT		147456 MB/sec
GeForce GT 420		28800 MB/sec
	Difference: 118656 (412%)

Texel Rate

The Radeon RX 6500 XT should be quite a bit (approximately 2414%) more effective at texture filtering than the GeForce GT 420. (explain)

Radeon RX 6500 XT		140800 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 135200 (2414%)

Pixel Rate

The Radeon RX 6500 XT is much (about 2414%) more effective at FSAA than the GeForce GT 420, and capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon RX 6500 XT		70400 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 67600 (2414%)

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 max amount of data (measured in MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total amount of texture units of the card by the core 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.