GeForce GT 420 vs Radeon RX 5500 XT

Intro

Compare those specifications to the Radeon RX 5500 XT, which comes with core speeds of 1717 MHz on the GPU, and 1750 MHz on the 8192 MB of GDDR6 memory. It features 1408 SPUs along with 88 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420		50 Watts
Radeon RX 5500 XT		130 Watts
	Difference: 80 Watts (160%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 5500 XT is 696% quicker than the GeForce GT 420 overall, due to its higher data rate. (explain)

Radeon RX 5500 XT		229376 MB/sec
GeForce GT 420		28800 MB/sec
	Difference: 200576 (696%)

Texel Rate

The Radeon RX 5500 XT should be a lot (approximately 2598%) faster with regards to texture filtering than the GeForce GT 420. (explain)

Radeon RX 5500 XT		151096 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 145496 (2598%)

Pixel Rate

The Radeon RX 5500 XT is a lot (approximately 1862%) more effective at AA than the GeForce GT 420, and also able to handle higher screen resolutions while still performing well. (explain)

Radeon RX 5500 XT		54944 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 52144 (1862%)

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 max amount of information (measured in megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR type memory, the result should 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per 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 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 the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock 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 many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.