GeForce GTX 460 1GB vs GeForce GTX 860M

Intro

Compare those specs to the GeForce GTX 860M, which comes with core clock speeds of 797 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 RAM. It features 1152 SPUs along with 96 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M		45 Watts
GeForce GTX 460 1GB		160 Watts
	Difference: 115 Watts (256%)

Memory Bandwidth

The GeForce GTX 460 1GB should in theory be a lot faster than the GeForce GTX 860M overall. (explain)

GeForce GTX 460 1GB		115200 MB/sec
GeForce GTX 860M		64000 MB/sec
	Difference: 51200 (80%)

Texel Rate

The GeForce GTX 860M is much (approximately 102%) better at AF than the GeForce GTX 460 1GB. (explain)

GeForce GTX 860M		76512 Mtexels/sec
GeForce GTX 460 1GB		37800 Mtexels/sec
	Difference: 38712 (102%)

Pixel Rate

The GeForce GTX 460 1GB should be quite a bit (approximately 69%) 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 1GB		21600 Mpixels/sec
GeForce GTX 860M		12752 Mpixels/sec
	Difference: 8848 (69%)

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 (in units of megabytes per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, 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 is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics 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 that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.