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GeForce 940M vs GeForce GTX 950M

Intro

The GeForce 940M makes use of a 28 nm design. nVidia has clocked the core frequency at 1072 MHz. The DDR3 RAM is set to run at a speed of 1000 MHz on this model. It features 384 SPUs as well as 24 TAUs and 8 Rasterization Operator Units.

Compare those specifications to the GeForce GTX 950M, which has a clock speed of 914 MHz and a DDR3 memory frequency of 1000 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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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 950M		3330 points
GeForce 940M		1740 points
	Difference: 1590 (91%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 950M should theoretically perform a lot faster than the GeForce 940M in general. (explain)

GeForce GTX 950M		32000 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 16000 (100%)

Texel Rate

The GeForce GTX 950M will be quite a bit (approximately 42%) faster with regards to texture filtering than the GeForce 940M. (explain)

GeForce GTX 950M		36560 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 10832 (42%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 950M is a better choice, and very much so. (explain)

GeForce GTX 950M		14624 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 6048 (71%)

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

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GeForce 940M

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GeForce GTX 950M

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Specifications

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Model	GeForce 940M	GeForce GTX 950M
Manufacturer	nVidia	nVidia
Year	March 12 2015	March 12 2015
Code Name	GM108	GM107
Memory	2048 MB	2048 MB
Core Speed	1072 MHz	914 MHz
Memory Speed	2000 MHz	2000 MHz
Power (Max TDP)	(Unknown) watts	55 watts
Bandwidth	16000 MB/sec	32000 MB/sec
Texel Rate	25728 Mtexels/sec	36560 Mtexels/sec
Pixel Rate	8576 Mpixels/sec	14624 Mpixels/sec
Unified Shaders	384	640
Texture Mapping Units	24	40
Render Output Units	8	16
Bus Type	DDR3	DDR3
Bus Width	64-bit	128-bit
Fab Process	28 nm	28 nm
Transistors	(Unknown) million	(Unknown) million
Bus	PCIe 3.0 x16	PCIe 3.0 x16
DirectX Version	DirectX 12	DirectX 12
OpenGL Version	OpenGL 4.5	OpenGL 4.5

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If 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 high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

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