GeForce GTX 650 Ti 2GB vs GeForce GTX 660

Intro

Compare those specifications to the GeForce GTX 660, which uses a 28 nm design. nVidia has clocked the core frequency at 980 MHz. The GDDR5 memory is set to run at a frequency of 1502 MHz on this specific model. It features 960 SPUs as well as 80 Texture Address Units 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		140 Watts
	Difference: 30 Watts (27%)

Memory Bandwidth

Performance-wise, the GeForce GTX 660 should theoretically be quite a bit better than the GeForce GTX 650 Ti 2GB in general. (explain)

GeForce GTX 660		144192 MB/sec
GeForce GTX 650 Ti 2GB		86400 MB/sec
	Difference: 57792 (67%)

Texel Rate

The GeForce GTX 660 is quite a bit (more or less 32%) faster with regards to anisotropic filtering than the GeForce GTX 650 Ti 2GB. (explain)

GeForce GTX 660		78400 Mtexels/sec
GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
	Difference: 19008 (32%)

Pixel Rate

The GeForce GTX 660 should be quite a bit (more or less 58%) more effective at AA than the GeForce GTX 650 Ti 2GB, and will be able to handle higher resolutions more effectively. (explain)

GeForce GTX 660		23520 Mpixels/sec
GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
	Difference: 8672 (58%)

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 largest amount of information (measured in MB per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it 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 anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.