GeForce 9800 GT 512MB vs GeForce GTX 880M

Intro

Compare all that to the GeForce GTX 880M, which has a clock frequency of 954 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It is made up of 1536 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 512MB		105 Watts
GeForce GTX 880M		130 Watts
	Difference: 25 Watts (24%)

Memory Bandwidth

In theory, the GeForce GTX 880M will be 122% faster than the GeForce 9800 GT 512MB in general, because of its higher bandwidth. (explain)

GeForce GTX 880M		128000 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 70400 (122%)

Texel Rate

The GeForce GTX 880M should be much (about 263%) more effective at AF than the GeForce 9800 GT 512MB. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 88512 (263%)

Pixel Rate

The GeForce GTX 880M will be a lot (more or less 218%) more effective at AA than the GeForce 9800 GT 512MB, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce 9800 GT 512MB		9600 Mpixels/sec
	Difference: 20928 (218%)

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: Memory bandwidth is the max amount of information (measured in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could 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 ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.