GeForce GTX 650 Ti 2GB vs GeForce GTX 750 Ti

Intro

Compare those specifications to the GeForce GTX 750 Ti, which makes use of a 28 nm design. nVidia has set the core speed at 1020 MHz. The GDDR5 memory runs at a speed of 1350 MHz on this specific model. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750 Ti		60 Watts
GeForce GTX 650 Ti 2GB		110 Watts
	Difference: 50 Watts (83%)

Memory Bandwidth

Both cards have the exact same memory bandwidth, so in theory they should perform exactly the same. (explain)

Texel Rate

The GeForce GTX 650 Ti 2GB should be much (more or less 46%) better at anisotropic filtering than the GeForce GTX 750 Ti. (explain)

GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
GeForce GTX 750 Ti		40800 Mtexels/sec
	Difference: 18592 (46%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 750 Ti is superior to the GeForce GTX 650 Ti 2GB, but it probably won't make a huge difference. (explain)

GeForce GTX 750 Ti		16320 Mpixels/sec
GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
	Difference: 1472 (10%)

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 data (in units of MB per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR memory, the result should 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 anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant 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.