GeForce GT 430 (OEM) vs GeForce GTX 850M

Intro

Compare that to the GeForce GTX 850M, which comes with a GPU core clock speed of 876 MHz, and 2048 MB of DDR3 RAM set to run at 1000 MHz through a 128-bit bus. It also is comprised of 640 Stream Processors, 40 Texture Address Units, and 16 Raster Operation 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

In theory, the GeForce GTX 850M should be 11% faster than the GeForce GT 430 (OEM) overall, due to 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 is a lot (approximately 213%) more effective 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

The GeForce GTX 850M will be quite a bit (about 401%) more effective at full screen anti-aliasing than the GeForce GT 430 (OEM), and will be capable of handling higher resolutions without losing too much performance. (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 largest amount of information (counted in megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.