GeForce 8800 GTX vs GeForce GT 450 (OEM)

Intro

Compare those specs to the GeForce GT 450 (OEM), which features a GPU core clock speed of 790 MHz, and 1536 MB of GDDR5 RAM set to run at 1000 MHz through a 192-bit bus. It also features 144 SPUs, 24 Texture Address Units, and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
GeForce 8800 GTX		155 Watts
	Difference: 49 Watts (46%)

Memory Bandwidth

As far as performance goes, the GeForce GT 450 (OEM) should in theory be just a bit better than the GeForce 8800 GTX in general. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
GeForce 8800 GTX		86400 MB/sec
	Difference: 9600 (11%)

Texel Rate

The GeForce 8800 GTX is quite a bit (about 94%) faster with regards to AF than the GeForce GT 450 (OEM). (explain)

GeForce 8800 GTX		36800 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 17840 (94%)

Pixel Rate

The GeForce GT 450 (OEM) will be a lot (approximately 37%) better at AA than the GeForce 8800 GTX, and also will be able to handle higher screen resolutions more effectively. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
GeForce 8800 GTX		13800 Mpixels/sec
	Difference: 5160 (37%)

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 max amount of data (measured in megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units by the core clock 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.