GeForce 830M vs GeForce GTX 260 Core 216

Intro

Compare those specifications to the GeForce GTX 260 Core 216, which makes use of a 65 nm design. nVidia has set the core speed at 576 MHz. The GDDR3 memory works at a speed of 999 MHz on this particular model. It features 216 SPUs along with 72 Texture Address Units and 28 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
GeForce GTX 260 Core 216		202 Watts
	Difference: 177 Watts (708%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 260 Core 216 will be 677% quicker than the GeForce 830M in general, because of its greater data rate. (explain)

GeForce GTX 260 Core 216		111888 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 97488 (677%)

Texel Rate

The GeForce GTX 260 Core 216 is much (approximately 152%) faster with regards to anisotropic filtering than the GeForce 830M. (explain)

GeForce GTX 260 Core 216		41472 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 25008 (152%)

Pixel Rate

The GeForce GTX 260 Core 216 will be a lot (about 96%) faster with regards to AA than the GeForce 830M, and also should be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 260 Core 216		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: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be transported past 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 type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the 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 the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.