GeForce 830M vs Geforce GTX 690

Intro

Compare those specs to the Geforce GTX 690, which has core speeds of 915 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Geforce GTX 690		300 Watts
	Difference: 275 Watts (1100%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 690 should theoretically be a lot superior to the GeForce 830M overall. (explain)

Geforce GTX 690		384512 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 370112 (2570%)

Texel Rate

The Geforce GTX 690 should be quite a bit (about 1323%) faster with regards to anisotropic filtering than the GeForce 830M. (explain)

Geforce GTX 690		234240 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 217776 (1323%)

Pixel Rate

If using a high resolution is important to you, then the Geforce GTX 690 is the winner, by a large margin. (explain)

Geforce GTX 690		58560 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 50328 (611%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of 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 speed of the chip. The higher 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 amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.