GeForce GT 450 (OEM) vs GeForce GTX 750 Ti

Intro

Compare those specifications to the GeForce GTX 750 Ti, which comes with core clock speeds of 1020 MHz on the GPU, and 1350 MHz on the 2048 MB of GDDR5 RAM. 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 GT 450 (OEM)		106 Watts
	Difference: 46 Watts (77%)

Memory Bandwidth

In theory, the GeForce GT 450 (OEM) is 11% faster than the GeForce GTX 750 Ti overall, due to its greater bandwidth. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
GeForce GTX 750 Ti		86400 MB/sec
	Difference: 9600 (11%)

Texel Rate

The GeForce GTX 750 Ti will be much (more or less 115%) faster with regards to AF than the GeForce GT 450 (OEM). (explain)

GeForce GTX 750 Ti		40800 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 21840 (115%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GT 450 (OEM) is the winner, though not by far. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
GeForce GTX 750 Ti		16320 Mpixels/sec
	Difference: 2640 (16%)

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 maximum amount of data (in units of megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.