GeForce 810M vs GeForce GTX 870M

Intro

Compare those specs to the GeForce GTX 870M, which comes with a core clock speed of 941 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 192-bit bus, and uses a 28 nm design. It is comprised of 1344 SPUs, 112 TAUs, and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 810M		15 Watts
GeForce GTX 870M		110 Watts
	Difference: 95 Watts (633%)

Memory Bandwidth

Performance-wise, the GeForce GTX 870M should in theory be quite a bit superior to the GeForce 810M overall. (explain)

GeForce GTX 870M		96000 MB/sec
GeForce 810M		14400 MB/sec
	Difference: 81600 (567%)

Texel Rate

The GeForce GTX 870M is much (more or less 1685%) faster with regards to texture filtering than the GeForce 810M. (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce 810M		5904 Mtexels/sec
	Difference: 99488 (1685%)

Pixel Rate

The GeForce GTX 870M is much (more or less 665%) faster with regards to full screen anti-aliasing than the GeForce 810M, and should be capable of handling higher screen resolutions better. (explain)

GeForce GTX 870M		22584 Mpixels/sec
GeForce 810M		2952 Mpixels/sec
	Difference: 19632 (665%)

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 megabytes per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the interface 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 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 in one second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.