GeForce GTX 460 (OEM) vs GeForce GTX 870M

Intro

Compare all of that to the GeForce GTX 870M, which uses a 28 nm design. nVidia has clocked the core frequency at 941 MHz. The GDDR5 RAM runs at a speed of 1000 MHz on this particular model. It features 1344 SPUs as well as 112 TAUs and 24 Rasterization Operator Units.

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

Theoretically speaking, the GeForce GTX 460 (OEM) should be 13% faster than the GeForce GTX 870M in general, due to its greater bandwidth. (explain)

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

Texel Rate

The GeForce GTX 870M is much (approximately 190%) faster with regards to texture filtering 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

The GeForce GTX 870M is just a bit (approximately 9%) faster with regards to FSAA than the GeForce GTX 460 (OEM), and will be able to handle higher resolutions while still performing well. (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 max amount of data (measured in MB per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.