GeForce GTX 460 (OEM) vs GeForce GTX 870M

Intro

Compare all of that to the GeForce GTX 870M, which makes use of a 28 nm design. nVidia has set the core speed at 941 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this model. It features 1344 SPUs as well as 112 Texture Address Units and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M		110 Watts
GeForce GTX 460 (OEM)		150 Watts
	Difference: 40 Watts (36%)

Memory Bandwidth

The GeForce GTX 460 (OEM) should theoretically perform just a bit faster than the GeForce GTX 870M overall. (explain)

GeForce GTX 460 (OEM)		108800 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 12800 (13%)

Texel Rate

The GeForce GTX 870M should be quite a bit (about 190%) better at AF than the GeForce GTX 460 (OEM). (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce GTX 460 (OEM)		36400 Mtexels/sec
	Difference: 68992 (190%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 870M is superior to the GeForce GTX 460 (OEM), but not by far. (explain)

GeForce GTX 870M		22584 Mpixels/sec
GeForce GTX 460 (OEM)		20800 Mpixels/sec
	Difference: 1784 (9%)

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 (in units of megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, 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 is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.