GeForce GTX 275 vs GeForce GTX 980M

Intro

Compare those specs to the GeForce GTX 980M, which features a GPU core clock speed of 1038 MHz, and 4096 MB of GDDR5 RAM set to run 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 275		219 Watts
	Difference: 119 Watts (119%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 980M should in theory be a little bit better than the GeForce GTX 275 in general. (explain)

GeForce GTX 980M		128000 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 992 (1%)

Texel Rate

The GeForce GTX 980M is quite a bit (about 97%) better at AF than the GeForce GTX 275. (explain)

GeForce GTX 980M		99648 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 49008 (97%)

Pixel Rate

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

GeForce GTX 980M		66432 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 48708 (275%)

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 max amount of information (counted in MB per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.