GeForce 8800 GS vs GeForce GTX 850M

Intro

Compare that to the GeForce GTX 850M, which has core clock speeds of 876 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce 8800 GS		105 Watts
	Difference: 65 Watts (163%)

Memory Bandwidth

The GeForce 8800 GS should in theory perform just a bit faster than the GeForce GTX 850M overall. (explain)

GeForce 8800 GS		38400 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 6400 (20%)

Texel Rate

The GeForce GTX 850M is a lot (about 33%) better at texture filtering than the GeForce 8800 GS. (explain)

GeForce GTX 850M		35040 Mtexels/sec
GeForce 8800 GS		26400 Mtexels/sec
	Difference: 8640 (33%)

Pixel Rate

The GeForce GTX 850M will be a lot (more or less 112%) more effective at anti-aliasing than the GeForce 8800 GS, and also should be capable of handling higher resolutions better. (explain)

GeForce GTX 850M		14016 Mpixels/sec
GeForce 8800 GS		6600 Mpixels/sec
	Difference: 7416 (112%)

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 information (counted in megabytes per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.