GeForce 830M vs Geforce GTX 670

Intro

Compare all that to the Geforce GTX 670, which uses a 28 nm design. nVidia has set the core frequency at 915 MHz. The GDDR5 memory is set to run at a frequency of 1500 MHz on this model. It features 1344 SPUs as well as 112 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Geforce GTX 670		170 Watts
	Difference: 145 Watts (580%)

Memory Bandwidth

The Geforce GTX 670, in theory, should perform much faster than the GeForce 830M overall. (explain)

Geforce GTX 670		192000 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 177600 (1233%)

Texel Rate

The Geforce GTX 670 is much (about 522%) faster with regards to texture filtering than the GeForce 830M. (explain)

Geforce GTX 670		102480 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 86016 (522%)

Pixel Rate

If using a high resolution is important to you, then the Geforce GTX 670 is the winner, and very much so. (explain)

Geforce GTX 670		29280 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 21048 (256%)

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 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 bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

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