GeForce 830M vs Geforce GTX 680

Intro

Compare those specifications to the Geforce GTX 680, which has a GPU core clock speed of 1006 MHz, and 2048 MB of GDDR5 RAM running at 1502 MHz through a 256-bit bus. It also features 1536 Stream Processors, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Geforce GTX 680		195 Watts
	Difference: 170 Watts (680%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 680 should theoretically be quite a bit better than the GeForce 830M overall. (explain)

Geforce GTX 680		192256 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 177856 (1235%)

Texel Rate

The Geforce GTX 680 will be much (approximately 682%) more effective at texture filtering than the GeForce 830M. (explain)

Geforce GTX 680		128768 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 112304 (682%)

Pixel Rate

If using a high screen resolution is important to you, then the Geforce GTX 680 is superior to the GeForce 830M, and very much so. (explain)

Geforce GTX 680		32192 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 23960 (291%)

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 largest amount of data (counted in megabytes per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.