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

Intro

Compare those specifications to the GeForce 8800 GTS (G80) 320MB, which uses a 90 nm design. nVidia has set the core frequency at 513 MHz. The GDDR3 RAM is set to run at a frequency of 792 MHz on this specific card. It features 96 SPUs along with 48 Texture Address Units and 20 Rasterization Operator Units.

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

Performance-wise, the GeForce 8800 GTS (G80) 320MB should in theory be much better than the GeForce 830M in general. (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 will be much (about 50%) faster with regards to AF than the GeForce 830M. (explain)

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

Pixel Rate

The GeForce 8800 GTS (G80) 320MB should be much (more or less 25%) faster with regards to anti-aliasing than the GeForce 830M, and also capable of handling higher screen resolutions while still performing well. (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 largest amount of information (counted in MB per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 applied per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, 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 the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.