GeForce GTX 460 (OEM) vs GeForce GTX 870M

Intro

Compare those specs to the GeForce GTX 870M, which uses a 28 nm design. nVidia has set the core frequency at 941 MHz. The GDDR5 memory runs at a speed of 1000 MHz on this particular card. It features 1344 SPUs along with 112 TAUs 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 in theory perform a little bit faster than the GeForce GTX 870M in general. (explain)

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

Texel Rate

The GeForce GTX 870M is a lot (more or less 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 using a high resolution is important to you, then the GeForce GTX 870M is superior to the GeForce GTX 460 (OEM), but only just. (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: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the 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 amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount 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 in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.