GeForce GTX 275 vs GeForce GTX 950M

Intro

Compare all that to the GeForce GTX 950M, which makes use of a 28 nm design. nVidia has clocked the core speed at 914 MHz. The DDR3 memory runs at a speed of 1000 MHz on this specific model. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950M		55 Watts
GeForce GTX 275		219 Watts
	Difference: 164 Watts (298%)

Memory Bandwidth

The GeForce GTX 275, in theory, should be much faster than the GeForce GTX 950M overall. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTX 950M		32000 MB/sec
	Difference: 95008 (297%)

Texel Rate

The GeForce GTX 275 will be much (about 39%) more effective at texture filtering than the GeForce GTX 950M. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GTX 950M		36560 Mtexels/sec
	Difference: 14080 (39%)

Pixel Rate

The GeForce GTX 275 is quite a bit (approximately 21%) better at anti-aliasing than the GeForce GTX 950M, and also will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce GTX 950M		14624 Mpixels/sec
	Difference: 3100 (21%)

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 (in units of MB per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling 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 card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.