GeForce GTX 580 3GB vs GeForce GTX 780 Ti

Intro

Compare that to the GeForce GTX 780 Ti, which comes with core clock speeds of 875 MHz on the GPU, and 1750 MHz on the 3072 MB of GDDR5 memory. It features 2880 SPUs as well as 240 Texture Address Units and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 580 3GB		244 Watts
GeForce GTX 780 Ti		250 Watts
	Difference: 6 Watts (2%)

Memory Bandwidth

Performance-wise, the GeForce GTX 780 Ti should theoretically be a lot superior to the GeForce GTX 580 3GB overall. (explain)

GeForce GTX 780 Ti		336000 MB/sec
GeForce GTX 580 3GB		192384 MB/sec
	Difference: 143616 (75%)

Texel Rate

The GeForce GTX 780 Ti should be quite a bit (approximately 325%) faster with regards to anisotropic filtering than the GeForce GTX 580 3GB. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
GeForce GTX 580 3GB		49408 Mtexels/sec
	Difference: 160592 (325%)

Pixel Rate

The GeForce GTX 780 Ti will be a small bit (more or less 13%) more effective at FSAA than the GeForce GTX 580 3GB, and capable of handling higher resolutions more effectively. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
GeForce GTX 580 3GB		37056 Mpixels/sec
	Difference: 4944 (13%)

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 (measured in MB per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.