GeForce 9800 GX2 vs GeForce GTX 560 Ti 448

Intro

Compare those specifications to the GeForce GTX 560 Ti 448, which makes use of a 40 nm design. nVidia has set the core frequency at 732 MHz. The GDDR5 memory runs at a frequency of 900 MHz on this particular card. It features 448 SPUs along with 56 Texture Address Units and 40 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GX2		197 Watts
GeForce GTX 560 Ti 448		210 Watts
	Difference: 13 Watts (7%)

Memory Bandwidth

Theoretically, the GeForce GTX 560 Ti 448 should be just a bit faster than the GeForce 9800 GX2 in general. (explain)

GeForce GTX 560 Ti 448		144000 MB/sec
GeForce 9800 GX2		128000 MB/sec
	Difference: 16000 (13%)

Texel Rate

The GeForce 9800 GX2 should be a lot (more or less 87%) better at anisotropic filtering than the GeForce GTX 560 Ti 448. (explain)

GeForce 9800 GX2		76800 Mtexels/sec
GeForce GTX 560 Ti 448		40992 Mtexels/sec
	Difference: 35808 (87%)

Pixel Rate

The GeForce GTX 560 Ti 448 will be much (about 53%) better at FSAA than the GeForce 9800 GX2, and also capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 560 Ti 448		29280 Mpixels/sec
GeForce 9800 GX2		19200 Mpixels/sec
	Difference: 10080 (53%)

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 (counted in MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 maximum number of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.