GeForce GTX 560 Ti vs GeForce GTX 580 3GB

Intro

Compare that to the GeForce GTX 580 3GB, which has GPU core speed of 772 MHz, and 3072 MB of GDDR5 memory set to run at 1002 MHz through a 384-bit bus. It also features 512 Stream Processors, 64 TAUs, and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 560 Ti		170 Watts
GeForce GTX 580 3GB		244 Watts
	Difference: 74 Watts (44%)

Memory Bandwidth

The GeForce GTX 580 3GB should in theory be much faster than the GeForce GTX 560 Ti overall. (explain)

GeForce GTX 580 3GB		192384 MB/sec
GeForce GTX 560 Ti		128256 MB/sec
	Difference: 64128 (50%)

Texel Rate

The GeForce GTX 560 Ti will be just a bit (approximately 6%) faster with regards to anisotropic filtering than the GeForce GTX 580 3GB. (explain)

GeForce GTX 560 Ti		52608 Mtexels/sec
GeForce GTX 580 3GB		49408 Mtexels/sec
	Difference: 3200 (6%)

Pixel Rate

The GeForce GTX 580 3GB will be quite a bit (more or less 41%) more effective at AA than the GeForce GTX 560 Ti, and also capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 580 3GB		37056 Mpixels/sec
GeForce GTX 560 Ti		26304 Mpixels/sec
	Difference: 10752 (41%)

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 maximum amount of information (measured in MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total number of texture units 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 most pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core 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 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 reach the maximum fill rate.