GeForce GTX 285 1GB vs GeForce GTX 980M

Intro

Compare all of that to the GeForce GTX 980M, which features GPU core speed of 1038 MHz, and 4096 MB of GDDR5 memory set to run at 1000 MHz through a 256-bit bus. It also features 1536 Stream Processors, 96 TAUs, and 64 ROPs.

Display Graphs

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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

Performance-wise, the GeForce GTX 285 1GB should theoretically be a lot superior to 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 quite a bit (approximately 92%) better at AF 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 will be much (more or less 220%) more effective at anti-aliasing than the GeForce GTX 285 1GB, and will be able to handle higher screen resolutions while still performing well. (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: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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.