GeForce 8800 GTS (G80) 640MB vs GeForce GTX 960M

Intro

Compare those specifications to the GeForce GTX 960M, which features GPU core speed of 1096 MHz, and 2048 MB of GDDR5 RAM running at 1000 MHz through a 128-bit bus. It also is comprised of 640 Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 960M		65 Watts
GeForce 8800 GTS (G80) 640MB		143 Watts
	Difference: 78 Watts (120%)

Memory Bandwidth

Theoretically, the GeForce GTX 960M should be a small bit faster than the GeForce 8800 GTS (G80) 640MB in general. (explain)

GeForce GTX 960M		64000 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 640 (1%)

Texel Rate

The GeForce GTX 960M is a lot (about 78%) more effective at anisotropic filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce GTX 960M		43840 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 19216 (78%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 960M is a better choice, by a large margin. (explain)

GeForce GTX 960M		17536 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 7276 (71%)

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 transferred over the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.