GeForce GTX 580 3GB vs GeForce GTX 650 Ti

Intro

Compare that to the GeForce GTX 650 Ti, which makes use of a 28 nm design. nVidia has clocked the core frequency at 928 MHz. The GDDR5 RAM is set to run at a frequency of 1350 MHz on this specific card. It features 768 SPUs along with 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

In theory, the GeForce GTX 580 3GB should be 123% faster than the GeForce GTX 650 Ti overall, due to its greater data rate. (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 will be a little bit (approximately 20%) more effective at anisotropic 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

If using a high resolution is important to you, then the GeForce GTX 580 3GB is superior to the GeForce GTX 650 Ti, and very much so. (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 maximum amount of data (measured in MB per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 are processed per second. This 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 card will be at handling 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 that the graphics chip can possibly write 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 core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.