GeForce 9800 GX2 vs GeForce GTX 560 Ti

Intro

Compare those specs to the GeForce GTX 560 Ti, which comes with GPU core speed of 822 MHz, and 1024 MB of GDDR5 RAM running at 1002 MHz through a 256-bit bus. It also features 384 SPUs, 64 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 560 Ti		170 Watts
GeForce 9800 GX2		197 Watts
	Difference: 27 Watts (16%)

Memory Bandwidth

The GeForce GTX 560 Ti, in theory, should perform a small bit faster than the GeForce 9800 GX2 in general. (explain)

GeForce GTX 560 Ti		128256 MB/sec
GeForce 9800 GX2		128000 MB/sec
	Difference: 256 (0%)

Texel Rate

The GeForce 9800 GX2 is a lot (approximately 46%) more effective at anisotropic filtering than the GeForce GTX 560 Ti. (explain)

GeForce 9800 GX2		76800 Mtexels/sec
GeForce GTX 560 Ti		52608 Mtexels/sec
	Difference: 24192 (46%)

Pixel Rate

The GeForce GTX 560 Ti should be much (more or less 37%) more effective at FSAA than the GeForce 9800 GX2, and also will be able to handle higher resolutions more effectively. (explain)

GeForce GTX 560 Ti		26304 Mpixels/sec
GeForce 9800 GX2		19200 Mpixels/sec
	Difference: 7104 (37%)

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: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once 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 anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. 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 output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.