GeForce GTX 460 (OEM) vs GeForce GTX 860M

Intro

Compare all that to the GeForce GTX 860M, which features core speeds of 797 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 memory. It features 1152 SPUs as well as 96 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M		45 Watts
GeForce GTX 460 (OEM)		150 Watts
	Difference: 105 Watts (233%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 460 (OEM) should in theory be quite a bit superior to the GeForce GTX 860M overall. (explain)

GeForce GTX 460 (OEM)		108800 MB/sec
GeForce GTX 860M		64000 MB/sec
	Difference: 44800 (70%)

Texel Rate

The GeForce GTX 860M should be much (more or less 110%) faster with regards to AF than the GeForce GTX 460 (OEM). (explain)

GeForce GTX 860M		76512 Mtexels/sec
GeForce GTX 460 (OEM)		36400 Mtexels/sec
	Difference: 40112 (110%)

Pixel Rate

The GeForce GTX 460 (OEM) is much (about 63%) faster with regards to anti-aliasing than the GeForce GTX 860M, and will be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 460 (OEM)		20800 Mpixels/sec
GeForce GTX 860M		12752 Mpixels/sec
	Difference: 8048 (63%)

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 information (counted in MB per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 can be applied in one second. This figure is worked out by multiplying the total texture units of the card by the core 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 amount of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.