GeForce 920M vs GeForce 940M

Intro

Compare those specifications to the GeForce 940M, which makes use of a 28 nm design. nVidia has set the core speed at 1072 MHz. The DDR3 RAM runs at a frequency of 1000 MHz on this card. It features 384 SPUs as well as 24 Texture Address Units and 8 ROPs.

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 940M		1740 points
GeForce 920M		1180 points
	Difference: 560 (47%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce 940M should be a bit faster than the GeForce 920M overall. (explain)

GeForce 940M		16000 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 1600 (11%)

Texel Rate

The GeForce 920M should be a small bit (approximately 19%) more effective at texture filtering than the GeForce 940M. (explain)

GeForce 920M		30528 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 4800 (19%)

Pixel Rate

The GeForce 940M is a little bit (more or less 12%) more effective at AA than the GeForce 920M, and capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce 940M		8576 Mpixels/sec
GeForce 920M		7632 Mpixels/sec
	Difference: 944 (12%)

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: Memory bandwidth is the max amount of data (measured in MB per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the 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 number of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip 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 amount of Raster Operations Pipelines by the the core 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 lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.