GeForce GTX 285 1GB vs GeForce GTX 880M

Intro

Compare all that to the GeForce GTX 880M, which has a GPU core clock speed of 954 MHz, and 4096 MB of GDDR5 RAM running at 1000 MHz through a 256-bit bus. It also is made up of 1536 Stream Processors, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M		130 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 74 Watts (57%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 285 1GB should in theory be a lot superior to the GeForce GTX 880M in general. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce GTX 880M		128000 MB/sec
	Difference: 30976 (24%)

Texel Rate

The GeForce GTX 880M will be a lot (more or less 136%) better at AF than the GeForce GTX 285 1GB. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce GTX 285 1GB		51840 Mtexels/sec
	Difference: 70272 (136%)

Pixel Rate

The GeForce GTX 880M is much (more or less 47%) faster with regards to FSAA than the GeForce GTX 285 1GB, and should be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce GTX 285 1GB		20736 Mpixels/sec
	Difference: 9792 (47%)

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 maximum amount of information (measured in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 applied in one second. This number is worked out by multiplying the total number of 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.