GeForce GTX 260 vs GeForce GTX 980M

Intro

Compare those specifications 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 memory. It features 1536 SPUs as well as 96 TAUs 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		182 Watts
	Difference: 82 Watts (82%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 980M will be 14% faster than the GeForce GTX 260 overall, because of its greater data rate. (explain)

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

Texel Rate

The GeForce GTX 980M is a lot (more or less 170%) more effective at texture filtering than the GeForce GTX 260. (explain)

GeForce GTX 980M		99648 Mtexels/sec
GeForce GTX 260		36864 Mtexels/sec
	Difference: 62784 (170%)

Pixel Rate

The GeForce GTX 980M is quite a bit (more or less 312%) better at anti-aliasing than the GeForce GTX 260, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 980M		66432 Mpixels/sec
GeForce GTX 260		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 (in units of megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.