GeForce 830M vs Geforce GTX 690

Intro

Compare that to the Geforce GTX 690, which features GPU clock speed of 915 MHz, and 2048 MB of GDDR5 memory running at 1502 MHz through a 256-bit bus. It also is made up of 1536 SPUs, 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

Theoretically, the Geforce GTX 690 should be much faster than 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 will be much (more or less 1323%) faster with regards to AF than the GeForce 830M. (explain)

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

Pixel Rate

The Geforce GTX 690 will be a lot (more or less 611%) better at full screen anti-aliasing than the GeForce 830M, and will be able to handle higher screen resolutions better. (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: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.