GeForce 9800 GX2 vs GeForce GTX 750 Ti

Intro

Compare all that to the GeForce GTX 750 Ti, which comes with GPU core speed of 1020 MHz, and 2048 MB of GDDR5 memory running at 1350 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750 Ti		60 Watts
GeForce 9800 GX2		197 Watts
	Difference: 137 Watts (228%)

Memory Bandwidth

Theoretically, the GeForce 9800 GX2 should be quite a bit faster than the GeForce GTX 750 Ti overall. (explain)

GeForce 9800 GX2		128000 MB/sec
GeForce GTX 750 Ti		86400 MB/sec
	Difference: 41600 (48%)

Texel Rate

The GeForce 9800 GX2 should be much (more or less 88%) more effective at AF than the GeForce GTX 750 Ti. (explain)

GeForce 9800 GX2		76800 Mtexels/sec
GeForce GTX 750 Ti		40800 Mtexels/sec
	Difference: 36000 (88%)

Pixel Rate

The GeForce 9800 GX2 will be a little bit (more or less 18%) more effective at FSAA than the GeForce GTX 750 Ti, and will be able to handle higher resolutions more effectively. (explain)

GeForce 9800 GX2		19200 Mpixels/sec
GeForce GTX 750 Ti		16320 Mpixels/sec
	Difference: 2880 (18%)

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 max amount of information (counted in MB per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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