GeForce 8800 GT 512MB vs GeForce GTX 880M

Intro

Compare all that to the GeForce GTX 880M, which features clock speeds of 954 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 RAM. It features 1536 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB		105 Watts
GeForce GTX 880M		130 Watts
	Difference: 25 Watts (24%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 880M will be 122% quicker than the GeForce 8800 GT 512MB overall, because of its greater bandwidth. (explain)

GeForce GTX 880M		128000 MB/sec
GeForce 8800 GT 512MB		57600 MB/sec
	Difference: 70400 (122%)

Texel Rate

The GeForce GTX 880M should be quite a bit (about 263%) faster with regards to texture filtering than the GeForce 8800 GT 512MB. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce 8800 GT 512MB		33600 Mtexels/sec
	Difference: 88512 (263%)

Pixel Rate

The GeForce GTX 880M should be much (more or less 218%) more effective at full screen anti-aliasing than the GeForce 8800 GT 512MB, and will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce 8800 GT 512MB		9600 Mpixels/sec
	Difference: 20928 (218%)

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 (measured in MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once 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 AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount 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 filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.