GeForce 8800 GT 512MB vs GeForce 920M

Intro

Compare those specs to the GeForce 920M, which features clock speeds of 954 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 memory. It features 384 SPUs along with 32 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce 8800 GT 512MB should theoretically perform quite a bit faster than the GeForce 920M in general. (explain)

GeForce 8800 GT 512MB		57600 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 43200 (300%)

Texel Rate

The GeForce 8800 GT 512MB is a little bit (approximately 10%) more effective at texture filtering than the GeForce 920M. (explain)

GeForce 8800 GT 512MB		33600 Mtexels/sec
GeForce 920M		30528 Mtexels/sec
	Difference: 3072 (10%)

Pixel Rate

The GeForce 8800 GT 512MB will be quite a bit (more or less 26%) more effective at full screen anti-aliasing than the GeForce 920M, and will be able to handle higher resolutions more effectively. (explain)

GeForce 8800 GT 512MB		9600 Mpixels/sec
GeForce 920M		7632 Mpixels/sec
	Difference: 1968 (26%)

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 information (counted in MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 are processed per second. This figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.