GeForce GT 420 vs GeForce RTX 3080 12 GB

Intro

Compare those specifications to the GeForce RTX 3080 12 GB, which comes with GPU core speed of 1260 MHz, and 12288 MB of GDDR6X RAM running at 1188 MHz through a 384-bit bus. It also features 8960 SPUs, 280 TAUs, and 112 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420		50 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 300 Watts (600%)

Memory Bandwidth

Performance-wise, the GeForce RTX 3080 12 GB should theoretically be much superior to the GeForce GT 420 in general. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
GeForce GT 420		28800 MB/sec
	Difference: 905498 (3144%)

Texel Rate

The GeForce RTX 3080 12 GB is quite a bit (about 6200%) more effective at anisotropic filtering than the GeForce GT 420. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 347200 (6200%)

Pixel Rate

The GeForce RTX 3080 12 GB should be much (about 4940%) more effective at anti-aliasing than the GeForce GT 420, and capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 138320 (4940%)

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 megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's 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 fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.