GeForce GTX 1080 vs GeForce GTX 580 3GB

Intro

Compare all of that to the GeForce GTX 580 3GB, which comes with GPU clock speed of 772 MHz, and 3072 MB of GDDR5 RAM set to run at 1002 MHz through a 384-bit bus. It also is made up of 512 SPUs, 64 Texture Address Units, and 48 Raster Operation Units.

Display Graphs

Hide Graphs

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 will be 70% faster than the GeForce GTX 580 3GB overall, due to its greater bandwidth. (explain)

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

Texel Rate

The GeForce GTX 1080 should be a lot (more or less 420%) better at anisotropic 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

If using lots of anti-aliasing is important to you, then the GeForce GTX 1080 is superior to the GeForce GTX 580 3GB, by a large margin. (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 maximum amount of information (counted in megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at 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 can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.