GeForce GTX 580 3GB vs GeForce GTX 650 Ti

Intro

Compare that to the GeForce GTX 650 Ti, which features clock speeds of 928 MHz on the GPU, and 1350 MHz on the 1024 MB of GDDR5 memory. It features 768 SPUs as well as 64 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti		110 Watts
GeForce GTX 580 3GB		244 Watts
	Difference: 134 Watts (122%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 580 3GB should theoretically be quite a bit superior to the GeForce GTX 650 Ti in general. (explain)

GeForce GTX 580 3GB		192384 MB/sec
GeForce GTX 650 Ti		86400 MB/sec
	Difference: 105984 (123%)

Texel Rate

The GeForce GTX 650 Ti should be a small bit (approximately 20%) faster with regards to texture filtering than the GeForce GTX 580 3GB. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
GeForce GTX 580 3GB		49408 Mtexels/sec
	Difference: 9984 (20%)

Pixel Rate

The GeForce GTX 580 3GB should be much (approximately 150%) faster with regards to FSAA than the GeForce GTX 650 Ti, and also should be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 580 3GB		37056 Mpixels/sec
GeForce GTX 650 Ti		14848 Mpixels/sec
	Difference: 22208 (150%)

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 largest amount of information (measured in megabytes per second) that can be transferred over the external memory interface in one second. It's worked out 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 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure 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 output 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 maximum fill rate.