GeForce GTX 285 1GB vs GeForce GTX 980M

Intro

Compare all of that to the GeForce GTX 980M, which uses a 28 nm design. nVidia has set the core frequency at 1038 MHz. The GDDR5 memory is set to run at a speed of 1000 MHz on this particular model. It features 1536 SPUs as well as 96 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M		100 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 104 Watts (104%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 285 1GB should theoretically be a lot better than the GeForce GTX 980M in general. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce GTX 980M		128000 MB/sec
	Difference: 30976 (24%)

Texel Rate

The GeForce GTX 980M should be a lot (approximately 92%) faster with regards to anisotropic filtering than the GeForce GTX 285 1GB. (explain)

GeForce GTX 980M		99648 Mtexels/sec
GeForce GTX 285 1GB		51840 Mtexels/sec
	Difference: 47808 (92%)

Pixel Rate

The GeForce GTX 980M should be much (more or less 220%) faster with regards to FSAA than the GeForce GTX 285 1GB, and able to handle higher resolutions more effectively. (explain)

GeForce GTX 980M		66432 Mpixels/sec
GeForce GTX 285 1GB		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 largest amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per 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 higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs 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 ability to reach the maximum fill rate.