GeForce 9800 GX2 vs GeForce GTX 750 Ti

Intro

Compare that to the GeForce GTX 750 Ti, which uses a 28 nm design. nVidia has clocked the core speed at 1020 MHz. The GDDR5 RAM works at a speed of 1350 MHz on this model. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator 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

In theory, the GeForce 9800 GX2 should perform a lot 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 a lot (about 88%) faster with regards to anisotropic filtering 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 bit (more or less 18%) more effective at AA than the GeForce GTX 750 Ti, and should 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 largest amount of data (measured in MB per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.