GeForce 8800 GTS (G80) 320MB vs GeForce GTX 880M

Intro

Compare those specs to the GeForce GTX 880M, which comes with a core clock frequency of 954 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 256-bit bus, and uses a 28 nm design. It is comprised of 1536 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M		130 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 13 Watts (10%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 880M should be 102% quicker than the GeForce 8800 GTS (G80) 320MB overall, because of its greater bandwidth. (explain)

GeForce GTX 880M		128000 MB/sec
GeForce 8800 GTS (G80) 320MB		63360 MB/sec
	Difference: 64640 (102%)

Texel Rate

The GeForce GTX 880M will be much (approximately 396%) more effective at texture filtering than the GeForce 8800 GTS (G80) 320MB. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
	Difference: 97488 (396%)

Pixel Rate

The GeForce GTX 880M should be a lot (approximately 198%) better at FSAA than the GeForce 8800 GTS (G80) 320MB, and also able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
	Difference: 20268 (198%)

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 past the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of 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 better the texel rate, the better the video card will be at 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 the video card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.