GeForce 830M vs GeForce GTS 250 512MB

Intro

Compare those specs to the GeForce GTS 250 512MB, which uses a 65/55 nm design. nVidia has clocked the core frequency at 738 MHz. The GDDR3 RAM runs at a frequency of 1100 MHz on this particular model. It features 128 SPUs as well as 64 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 120 Watts (480%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 250 512MB should be 389% faster than the GeForce 830M in general, because of its greater data rate. (explain)

GeForce GTS 250 512MB		70400 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 56000 (389%)

Texel Rate

The GeForce GTS 250 512MB will be quite a bit (about 187%) better at anisotropic filtering than the GeForce 830M. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 30768 (187%)

Pixel Rate

The GeForce GTS 250 512MB should be a lot (more or less 43%) better at full screen anti-aliasing than the GeForce 830M, and should be able to handle higher resolutions without slowing down too much. (explain)

GeForce GTS 250 512MB		11808 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 3576 (43%)

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 (counted in MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.