GeForce GT 450 (OEM) vs GeForce GTX 750

Intro

Compare that to the GeForce GTX 750, which has a clock frequency of 1020 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 128-bit bus, and uses a 28 nm design. It is made up of 512 SPUs, 32 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750		55 Watts
GeForce GT 450 (OEM)		106 Watts
	Difference: 51 Watts (93%)

Memory Bandwidth

In theory, the GeForce GT 450 (OEM) should be a small bit faster than the GeForce GTX 750 in general. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
GeForce GTX 750		80000 MB/sec
	Difference: 16000 (20%)

Texel Rate

The GeForce GTX 750 should be much (about 72%) better at AF than the GeForce GT 450 (OEM). (explain)

GeForce GTX 750		32640 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 13680 (72%)

Pixel Rate

The GeForce GT 450 (OEM) will be a small bit (approximately 16%) more effective at AA than the GeForce GTX 750, and able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
GeForce GTX 750		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 (measured in MB per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the 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 are processed in one second. This number is calculated by multiplying the total amount of texture units 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.