GeForce 830M vs GeForce 8800 GTS (G80) 320MB

Intro

Compare those specifications to the GeForce 8800 GTS (G80) 320MB, which makes use of a 90 nm design. nVidia has set the core frequency at 513 MHz. The GDDR3 memory runs at a frequency of 792 MHz on this specific card. It features 96 SPUs as well as 48 Texture Address Units and 20 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 118 Watts (472%)

Memory Bandwidth

The GeForce 8800 GTS (G80) 320MB should theoretically perform quite a bit faster than the GeForce 830M overall. (explain)

GeForce 8800 GTS (G80) 320MB		63360 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 48960 (340%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB should be much (about 50%) more effective at AF than the GeForce 830M. (explain)

GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 8160 (50%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce 8800 GTS (G80) 320MB is the winner, by far. (explain)

GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 2028 (25%)

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 (in units of megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. 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 number of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.