GeForce GTX 460 (OEM) vs GeForce GTX 980M

Intro

Compare those specifications to the GeForce GTX 980M, which comes with GPU clock speed of 1038 MHz, and 4096 MB of GDDR5 memory running at 1000 MHz through a 256-bit bus. It also is made up of 1536 SPUs, 96 Texture Address Units, 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 (OEM)		150 Watts
	Difference: 50 Watts (50%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 980M should in theory be just a bit better than the GeForce GTX 460 (OEM) in general. (explain)

GeForce GTX 980M		128000 MB/sec
GeForce GTX 460 (OEM)		108800 MB/sec
	Difference: 19200 (18%)

Texel Rate

The GeForce GTX 980M will be a lot (about 174%) better at anisotropic filtering than the GeForce GTX 460 (OEM). (explain)

GeForce GTX 980M		99648 Mtexels/sec
GeForce GTX 460 (OEM)		36400 Mtexels/sec
	Difference: 63248 (174%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 980M is superior to the GeForce GTX 460 (OEM), by far. (explain)

GeForce GTX 980M		66432 Mpixels/sec
GeForce GTX 460 (OEM)		20800 Mpixels/sec
	Difference: 45632 (219%)

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 largest amount of information (in units of megabytes per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 applied in one second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the video 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 most pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.