GeForce GT 450 (OEM) vs GeForce GTX 580 3GB

Intro

Compare those specs to the GeForce GTX 580 3GB, which makes use of a 40 nm design. nVidia has set the core speed at 772 MHz. The GDDR5 RAM works at a speed of 1002 MHz on this model. It features 512 SPUs as well as 64 TAUs and 48 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
GeForce GTX 580 3GB		244 Watts
	Difference: 138 Watts (130%)

Memory Bandwidth

In theory, the GeForce GTX 580 3GB is 100% faster than the GeForce GT 450 (OEM) overall, because of its greater bandwidth. (explain)

GeForce GTX 580 3GB		192384 MB/sec
GeForce GT 450 (OEM)		96000 MB/sec
	Difference: 96384 (100%)

Texel Rate

The GeForce GTX 580 3GB is quite a bit (about 161%) better at AF than the GeForce GT 450 (OEM). (explain)

GeForce GTX 580 3GB		49408 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 30448 (161%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 580 3GB is superior to the GeForce GT 450 (OEM), by a large margin. (explain)

GeForce GTX 580 3GB		37056 Mpixels/sec
GeForce GT 450 (OEM)		18960 Mpixels/sec
	Difference: 18096 (95%)

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 (in units of megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.