GeForce 8800 GTX vs GeForce 940M

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce 8800 GTX should in theory be much superior to the GeForce 940M in general. (explain)

GeForce 8800 GTX		86400 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 70400 (440%)

Texel Rate

The GeForce 8800 GTX should be a lot (more or less 43%) faster with regards to texture filtering than the GeForce 940M. (explain)

GeForce 8800 GTX		36800 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 11072 (43%)

Pixel Rate

The GeForce 8800 GTX is a lot (approximately 61%) more effective at AA than the GeForce 940M, and should be capable of handling higher screen resolutions while still performing well. (explain)

GeForce 8800 GTX		13800 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 5224 (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 (counted in megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR 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 worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many 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.