GeForce GTX 285 1GB vs GeForce GTX 880M

Intro

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

Display Graphs

Hide Graphs

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

Theoretically speaking, the GeForce GTX 285 1GB is 24% quicker than the GeForce GTX 880M overall, due to its greater bandwidth. (explain)

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

Texel Rate

The GeForce GTX 880M is a lot (more or less 136%) better at texture filtering 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

If running with a high resolution is important to you, then the GeForce GTX 880M is the winner, by far. (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 max amount of information (in units of megabytes per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.