GeForce GTX 285 2GB vs GeForce GTX 980

Intro

Compare all of that to the GeForce GTX 980, which makes use of a 28 nm design. nVidia has set the core speed at 1126 MHz. The GDDR5 memory is set to run at a frequency of 1750 MHz on this specific model. It features 2048 SPUs as well as 128 TAUs and 64 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980		165 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 39 Watts (24%)

Memory Bandwidth

The GeForce GTX 980, in theory, should be a lot faster than the GeForce GTX 285 2GB overall. (explain)

GeForce GTX 980		224000 MB/sec
GeForce GTX 285 2GB		158976 MB/sec
	Difference: 65024 (41%)

Texel Rate

The GeForce GTX 980 will be much (more or less 178%) more effective at anisotropic filtering than the GeForce GTX 285 2GB. (explain)

GeForce GTX 980		144128 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 92288 (178%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 980 is a better choice, by far. (explain)

GeForce GTX 980		72064 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 51328 (248%)

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 information (counted in MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 processed in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 most pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.