GeForce 9800 GX2 vs GeForce GT 130

Intro

Compare that to the GeForce GT 130, which uses a 55 nm design. nVidia has clocked the core frequency at 500 MHz. The DDR2 memory works at a frequency of 250 MHz on this model. It features 48 SPUs along with 24 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 130		75 Watts
GeForce 9800 GX2		197 Watts
	Difference: 122 Watts (163%)

Memory Bandwidth

In theory, the GeForce 9800 GX2 should be 967% quicker than the GeForce GT 130 overall, due to its higher data rate. (explain)

GeForce 9800 GX2		128000 MB/sec
GeForce GT 130		12000 MB/sec
	Difference: 116000 (967%)

Texel Rate

The GeForce 9800 GX2 is much (approximately 540%) better at anisotropic filtering than the GeForce GT 130. (explain)

GeForce 9800 GX2		76800 Mtexels/sec
GeForce GT 130		12000 Mtexels/sec
	Difference: 64800 (540%)

Pixel Rate

The GeForce 9800 GX2 should be quite a bit (about 140%) more effective at anti-aliasing than the GeForce GT 130, and will be able to handle higher resolutions without losing too much performance. (explain)

GeForce 9800 GX2		19200 Mpixels/sec
GeForce GT 130		8000 Mpixels/sec
	Difference: 11200 (140%)

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: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.