GeForce 830M vs GeForce GTX 260

Intro

Compare all that to the GeForce GTX 260, which comes with a clock speed of 576 MHz and a GDDR3 memory frequency of 999 MHz. It also features a 448-bit bus, and makes use of a 65 nm design. It is made up of 192 SPUs, 64 TAUs, and 28 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
GeForce GTX 260		182 Watts
	Difference: 157 Watts (628%)

Memory Bandwidth

Performance-wise, the GeForce GTX 260 should in theory be a lot superior to the GeForce 830M in general. (explain)

GeForce GTX 260		111888 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 97488 (677%)

Texel Rate

The GeForce GTX 260 will be a lot (about 124%) more effective at AF than the GeForce 830M. (explain)

GeForce GTX 260		36864 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 20400 (124%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 260 is superior to the GeForce 830M, and very much so. (explain)

GeForce GTX 260		16128 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 7896 (96%)

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 information (counted in megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video 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 its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.