GeForce GT 230 vs GeForce GTX 850M

Intro

Compare those specifications 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 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GT 230		65 Watts
	Difference: 25 Watts (63%)

Memory Bandwidth

In theory, the GeForce GT 230 is 20% faster than the GeForce GTX 850M overall, due to its higher data rate. (explain)

GeForce GT 230		38400 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 6400 (20%)

Texel Rate

The GeForce GTX 850M will be much (about 298%) faster with regards to anisotropic filtering than the GeForce GT 230. (explain)

GeForce GTX 850M		35040 Mtexels/sec
GeForce GT 230		8800 Mtexels/sec
	Difference: 26240 (298%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 850M is superior to the GeForce GT 230, by a large margin. (explain)

GeForce GTX 850M		14016 Mpixels/sec
GeForce GT 230		4400 Mpixels/sec
	Difference: 9616 (219%)

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 (measured 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 RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is calculated 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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