GeForce GT 430 1GB vs GeForce GTX 850M

Intro

Compare those specs to the GeForce GTX 850M, which makes use of a 28 nm design. nVidia has clocked the core speed at 876 MHz. The DDR3 memory works at a speed of 1000 MHz on this particular card. It features 640 SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GT 430 1GB		60 Watts
	Difference: 20 Watts (50%)

Memory Bandwidth

The GeForce GTX 850M should theoretically perform just a bit faster than the GeForce GT 430 1GB in general. (explain)

GeForce GTX 850M		32000 MB/sec
GeForce GT 430 1GB		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 1GB. (explain)

GeForce GTX 850M		35040 Mtexels/sec
GeForce GT 430 1GB		11200 Mtexels/sec
	Difference: 23840 (213%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 850M is a better choice, by far. (explain)

GeForce GTX 850M		14016 Mpixels/sec
GeForce GT 430 1GB		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: Memory bandwidth is the max amount of data (counted in MB per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 texture map elements (texels) that can be processed in one second. This figure 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.