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GeForce 940M vs GeForce 9600 GSO ASUS 512

Intro

The GeForce 940M comes with a clock frequency of 1072 MHz and a DDR3 memory speed of 1000 MHz. It also makes use of a 64-bit bus, and uses a 28 nm design. It is made up of 384 SPUs, 24 Texture Address Units, and 8 ROPs.

Compare all that to the GeForce 9600 GSO ASUS 512, which uses a 65 nm design. nVidia has clocked the core speed at 550 MHz. The DDR2 memory runs at a speed of 500 MHz on this specific card. It features 96 SPUs along with 48 TAUs and 12 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Both cards have the exact same memory bandwidth, so theoretically they should have identical performance. (explain)

Texel Rate

The GeForce 9600 GSO ASUS 512 should be a small bit (about 3%) more effective at texture filtering than the GeForce 940M. (explain)

GeForce 9600 GSO ASUS 512		26400 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 672 (3%)

Pixel Rate

If using a high resolution is important to you, then the GeForce 940M is a better choice, and very much so. (explain)

GeForce 940M		8576 Mpixels/sec
GeForce 9600 GSO ASUS 512		6600 Mpixels/sec
	Difference: 1976 (30%)

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 9600 GSO ASUS 512

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Specifications

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Model	GeForce 940M	GeForce 9600 GSO ASUS 512
Manufacturer	nVidia	nVidia
Year	March 12 2015	September 2008
Code Name	GM108	G92
Memory	2048 MB	512 MB
Core Speed	1072 MHz	550 MHz
Memory Speed	2000 MHz	1000 MHz
Power (Max TDP)	(Unknown) watts	84 watts
Bandwidth	16000 MB/sec	16000 MB/sec
Texel Rate	25728 Mtexels/sec	26400 Mtexels/sec
Pixel Rate	8576 Mpixels/sec	6600 Mpixels/sec
Unified Shaders	384	96
Texture Mapping Units	24	48
Render Output Units	8	12
Bus Type	DDR3	DDR2
Bus Width	64-bit	128-bit
Fab Process	28 nm	65 nm
Transistors	(Unknown) million	754 million
Bus	PCIe 3.0 x16	PCIe x16 2.0
DirectX Version	DirectX 12	DirectX 10
OpenGL Version	OpenGL 4.5	OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in MB per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR 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 the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called 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, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

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