GeForce GTX 460 2GB vs GeForce GTX 980M

Intro

Compare those specifications to the GeForce GTX 980M, which has GPU core speed of 1038 MHz, and 4096 MB of GDDR5 memory running at 1000 MHz through a 256-bit bus. It also is comprised of 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 460 2GB		160 Watts
	Difference: 60 Watts (60%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 980M will be 11% faster than the GeForce GTX 460 2GB overall, because of its higher bandwidth. (explain)

GeForce GTX 980M		128000 MB/sec
GeForce GTX 460 2GB		115200 MB/sec
	Difference: 12800 (11%)

Texel Rate

The GeForce GTX 980M is a lot (about 164%) more effective at AF than the GeForce GTX 460 2GB. (explain)

GeForce GTX 980M		99648 Mtexels/sec
GeForce GTX 460 2GB		37800 Mtexels/sec
	Difference: 61848 (164%)

Pixel Rate

The GeForce GTX 980M will be much (about 208%) better at FSAA than the GeForce GTX 460 2GB, and will be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 980M		66432 Mpixels/sec
GeForce GTX 460 2GB		21600 Mpixels/sec
	Difference: 44832 (208%)

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 (measured in MB per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number 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 worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.