GeForce GTX 260 216SP 55 nm vs GeForce GTX 980M

Intro

Compare that to the GeForce GTX 980M, which comes with core clock speeds of 1038 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 RAM. It features 1536 SPUs along with 96 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M		100 Watts
GeForce GTX 260 216SP 55 nm		171 Watts
	Difference: 71 Watts (71%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 980M should in theory be a bit better than the GeForce GTX 260 216SP 55 nm overall. (explain)

GeForce GTX 980M		128000 MB/sec
GeForce GTX 260 216SP 55 nm		111888 MB/sec
	Difference: 16112 (14%)

Texel Rate

The GeForce GTX 980M should be quite a bit (more or less 140%) more effective at AF than the GeForce GTX 260 216SP 55 nm. (explain)

GeForce GTX 980M		99648 Mtexels/sec
GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
	Difference: 58176 (140%)

Pixel Rate

The GeForce GTX 980M should be a lot (more or less 312%) more effective at AA than the GeForce GTX 260 216SP 55 nm, and will be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 980M		66432 Mpixels/sec
GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
	Difference: 50304 (312%)

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 (measured in megabytes per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.