GeForce 8800 GS vs GeForce GTX 850M

Intro

Compare all that to the GeForce GTX 850M, which uses a 28 nm design. nVidia has clocked the core speed at 876 MHz. The DDR3 memory works at a speed of 1000 MHz on this particular model. It features 640 SPUs as well as 40 TAUs 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 a little bit faster than the GeForce GTX 850M in general. (explain)

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

Texel Rate

The GeForce GTX 850M should be quite a bit (approximately 33%) more effective at AF 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 AA than the GeForce 8800 GS, and also able to handle higher screen resolutions while still performing well. (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: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant 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.