GeForce GTX 460 (OEM) vs GeForce GTX 850M

Intro

Compare all of that to the GeForce GTX 850M, which features core clock speeds of 876 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GTX 460 (OEM)		150 Watts
	Difference: 110 Watts (275%)

Memory Bandwidth

In theory, the GeForce GTX 460 (OEM) will be 240% quicker than the GeForce GTX 850M in general, because of its greater data rate. (explain)

GeForce GTX 460 (OEM)		108800 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 76800 (240%)

Texel Rate

The GeForce GTX 460 (OEM) should be a bit (approximately 4%) more effective at AF than the GeForce GTX 850M. (explain)

GeForce GTX 460 (OEM)		36400 Mtexels/sec
GeForce GTX 850M		35040 Mtexels/sec
	Difference: 1360 (4%)

Pixel Rate

The GeForce GTX 460 (OEM) will be much (more or less 48%) more effective at FSAA than the GeForce GTX 850M, and also should be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 460 (OEM)		20800 Mpixels/sec
GeForce GTX 850M		14016 Mpixels/sec
	Difference: 6784 (48%)

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 (counted in megabytes per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.