GeForce GTX 460 (OEM) vs GeForce GTX 860M

Intro

Compare those specifications to the GeForce GTX 860M, which comes with a core clock frequency of 797 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It is comprised of 1152 SPUs, 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

Theoretically speaking, the GeForce GTX 460 (OEM) should be 70% faster than the GeForce GTX 860M overall, due to its greater bandwidth. (explain)

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

Texel Rate

The GeForce GTX 860M will be much (approximately 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) should be quite a bit (approximately 63%) faster with regards to full screen anti-aliasing than the GeForce GTX 860M, and also will be capable of handling higher screen 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 largest amount of information (in units of MB per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 processed per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

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