GeForce GTX 660 vs GeForce GTX 950M

Intro

Compare those specifications to the GeForce GTX 950M, which uses a 28 nm design. nVidia has set the core speed at 914 MHz. The DDR3 RAM is set to run at a speed of 1000 MHz on this specific model. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 660		5063 points
GeForce GTX 950M		3330 points
	Difference: 1733 (52%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950M		55 Watts
GeForce GTX 660		140 Watts
	Difference: 85 Watts (155%)

Memory Bandwidth

The GeForce GTX 660 should theoretically be much faster than the GeForce GTX 950M overall. (explain)

GeForce GTX 660		144192 MB/sec
GeForce GTX 950M		32000 MB/sec
	Difference: 112192 (351%)

Texel Rate

The GeForce GTX 660 will be a lot (about 114%) better at anisotropic filtering than the GeForce GTX 950M. (explain)

GeForce GTX 660		78400 Mtexels/sec
GeForce GTX 950M		36560 Mtexels/sec
	Difference: 41840 (114%)

Pixel Rate

The GeForce GTX 660 is much (more or less 61%) better at AA than the GeForce GTX 950M, and also should be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 660		23520 Mpixels/sec
GeForce GTX 950M		14624 Mpixels/sec
	Difference: 8896 (61%)

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 (in units of megabytes per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs 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 rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.