GeForce 940M vs GeForce GTX 880M

Intro

Compare that to the GeForce GTX 880M, which has core clock speeds of 954 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 memory. It features 1536 SPUs along with 128 TAUs and 32 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 GTX 880M		6360 points
GeForce 940M		1740 points
	Difference: 4620 (266%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 880M should in theory be much faster than the GeForce 940M overall. (explain)

GeForce GTX 880M		128000 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 112000 (700%)

Texel Rate

The GeForce GTX 880M is a lot (more or less 375%) faster with regards to anisotropic filtering than the GeForce 940M. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 96384 (375%)

Pixel Rate

The GeForce GTX 880M will be a lot (about 256%) more effective at AA than the GeForce 940M, and able to handle higher resolutions more effectively. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 21952 (256%)

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 maximum amount of data (measured in megabytes per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range 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 calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at 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 that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour 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 output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.