GeForce GTX 650 Ti 2GB vs GeForce GTX 660 Ti

Intro

Compare all of that to the GeForce GTX 660 Ti, which comes with a core clock frequency of 915 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 192-bit memory bus, and makes use of a 28 nm design. It is comprised of 1344 SPUs, 112 TAUs, and 24 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti 2GB		110 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 40 Watts (36%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 660 Ti should in theory be quite a bit superior to the GeForce GTX 650 Ti 2GB overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
GeForce GTX 650 Ti 2GB		86400 MB/sec
	Difference: 57600 (67%)

Texel Rate

The GeForce GTX 660 Ti is much (approximately 73%) more effective at anisotropic filtering than the GeForce GTX 650 Ti 2GB. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
	Difference: 43088 (73%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 660 Ti is superior to the GeForce GTX 650 Ti 2GB, and very much so. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
	Difference: 7112 (48%)

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 max amount of data (counted in MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's 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 fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.