GeForce GTX 285 2GB vs GeForce GTX 980M

Intro

Compare that to the GeForce GTX 980M, which makes use of a 28 nm design. nVidia has clocked the core speed at 1038 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this specific model. It features 1536 SPUs as well as 96 TAUs and 64 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M		100 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 104 Watts (104%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 285 2GB should in theory be much better than the GeForce GTX 980M in general. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GTX 980M		128000 MB/sec
	Difference: 30976 (24%)

Texel Rate

The GeForce GTX 980M should be much (about 92%) better at anisotropic filtering than the GeForce GTX 285 2GB. (explain)

GeForce GTX 980M		99648 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 47808 (92%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 980M is a better choice, and very much so. (explain)

GeForce GTX 980M		66432 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 45696 (220%)

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 max amount of data (counted in megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total amount of texture units 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.