GeForce GT 430 vs GeForce GTX 850M

Intro

Compare those specs to the GeForce GTX 850M, which has GPU clock speed of 876 MHz, and 2048 MB of DDR3 memory set to run at 1000 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GT 430		60 Watts
	Difference: 20 Watts (50%)

Memory Bandwidth

In theory, the GeForce GTX 850M should be a little bit faster than the GeForce GT 430 overall. (explain)

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

Texel Rate

The GeForce GTX 850M is a lot (more or less 213%) better at AF than the GeForce GT 430. (explain)

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

Pixel Rate

The GeForce GTX 850M is a lot (approximately 401%) more effective at anti-aliasing than the GeForce GT 430, and able to handle higher screen resolutions better. (explain)

GeForce GTX 850M		14016 Mpixels/sec
GeForce GT 430		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 max amount of information (measured in megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's 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 number of texture map elements (texels) that can be processed in one 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 better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.