GeForce 830M vs GeForce GTX 580

Intro

Compare those specifications to the GeForce GTX 580, which comes with GPU clock speed of 772 MHz, and 1536 MB of GDDR5 memory set to run at 1002 MHz through a 384-bit bus. It also features 512 SPUs, 64 Texture Address Units, and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
GeForce GTX 580		244 Watts
	Difference: 219 Watts (876%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 580 should perform much faster than the GeForce 830M overall. (explain)

GeForce GTX 580		192384 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 177984 (1236%)

Texel Rate

The GeForce GTX 580 will be quite a bit (approximately 200%) faster with regards to AF than the GeForce 830M. (explain)

GeForce GTX 580		49408 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 32944 (200%)

Pixel Rate

The GeForce GTX 580 is quite a bit (more or less 350%) better at full screen anti-aliasing than the GeForce 830M, and also able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 580		37056 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 28824 (350%)

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 maximum amount of data (counted in megabytes per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also 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 - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.