GeForce GTX 580 vs GeForce RTX 3080 12 GB

Intro

Compare those specs to the GeForce RTX 3080 12 GB, which has a GPU core clock speed of 1260 MHz, and 12288 MB of GDDR6X RAM set to run at 1188 MHz through a 384-bit bus. It also features 8960 SPUs, 280 Texture Address Units, and 112 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 580		244 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 106 Watts (43%)

Memory Bandwidth

In theory, the GeForce RTX 3080 12 GB is 386% faster than the GeForce GTX 580 overall, due to its higher data rate. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
GeForce GTX 580		192384 MB/sec
	Difference: 741914 (386%)

Texel Rate

The GeForce RTX 3080 12 GB should be much (approximately 614%) better at texture filtering than the GeForce GTX 580. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
GeForce GTX 580		49408 Mtexels/sec
	Difference: 303392 (614%)

Pixel Rate

The GeForce RTX 3080 12 GB is a lot (about 281%) faster with regards to full screen anti-aliasing than the GeForce GTX 580, and will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
GeForce GTX 580		37056 Mpixels/sec
	Difference: 104064 (281%)

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 (measured in megabytes per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's 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 can be processed per second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.