GeForce GTX 1080 vs GeForce GTX 580 3GB

Intro

Compare all of that to the GeForce GTX 580 3GB, which uses a 40 nm design. nVidia has set the core frequency at 772 MHz. The GDDR5 memory works at a frequency of 1002 MHz on this model. It features 512 SPUs as well as 64 Texture Address Units and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 1080		180 Watts
GeForce GTX 580 3GB		244 Watts
	Difference: 64 Watts (36%)

Memory Bandwidth

In theory, the GeForce GTX 1080 should be 70% quicker than the GeForce GTX 580 3GB overall, because of its higher bandwidth. (explain)

GeForce GTX 1080		327680 MB/sec
GeForce GTX 580 3GB		192384 MB/sec
	Difference: 135296 (70%)

Texel Rate

The GeForce GTX 1080 is much (about 420%) better at texture filtering than the GeForce GTX 580 3GB. (explain)

GeForce GTX 1080		257120 Mtexels/sec
GeForce GTX 580 3GB		49408 Mtexels/sec
	Difference: 207712 (420%)

Pixel Rate

The GeForce GTX 1080 will be quite a bit (approximately 178%) better at AA than the GeForce GTX 580 3GB, and should be capable of handling higher resolutions better. (explain)

GeForce GTX 1080		102848 Mpixels/sec
GeForce GTX 580 3GB		37056 Mpixels/sec
	Difference: 65792 (178%)

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 information (counted in megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.