GeForce GT 430 (OEM) vs GeForce GTX 850M

Intro

Compare all of that to the GeForce GTX 850M, which has core clock speeds of 876 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 640 SPUs along with 40 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 850M		40 Watts
GeForce GT 430 (OEM)		60 Watts
	Difference: 20 Watts (50%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 850M is 11% faster than the GeForce GT 430 (OEM) overall, because of its higher bandwidth. (explain)

GeForce GTX 850M		32000 MB/sec
GeForce GT 430 (OEM)		28800 MB/sec
	Difference: 3200 (11%)

Texel Rate

The GeForce GTX 850M will be a lot (approximately 213%) better at anisotropic filtering than the GeForce GT 430 (OEM). (explain)

GeForce GTX 850M		35040 Mtexels/sec
GeForce GT 430 (OEM)		11200 Mtexels/sec
	Difference: 23840 (213%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 850M is superior to the GeForce GT 430 (OEM), and very much so. (explain)

GeForce GTX 850M		14016 Mpixels/sec
GeForce GT 430 (OEM)		2800 Mpixels/sec
	Difference: 11216 (401%)

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: Bandwidth is the maximum 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 card's interface width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.