GeForce 8800 GTS (G80) 640MB vs GeForce 930M

Intro

Compare that to the GeForce 930M, which makes use of a 28 nm design. nVidia has clocked the core speed at 928 MHz. The DDR3 memory works at a speed of 900 MHz on this particular card. It features 384 SPUs along with 24 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce 8800 GTS (G80) 640MB should be 340% faster than the GeForce 930M overall, because of its higher bandwidth. (explain)

GeForce 8800 GTS (G80) 640MB		63360 MB/sec
GeForce 930M		14400 MB/sec
	Difference: 48960 (340%)

Texel Rate

The GeForce 8800 GTS (G80) 640MB is a little bit (approximately 11%) faster with regards to anisotropic filtering than the GeForce 930M. (explain)

GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
GeForce 930M		22272 Mtexels/sec
	Difference: 2352 (11%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce 8800 GTS (G80) 640MB is the winner, by a large margin. (explain)

GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
GeForce 930M		7424 Mpixels/sec
	Difference: 2836 (38%)

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 data (counted in MB per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of 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 the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.