GeForce 9800 GX2 vs GeForce GTX 750 Ti

Intro

Compare those specifications to the GeForce GTX 750 Ti, which has a GPU core clock speed of 1020 MHz, and 2048 MB of GDDR5 memory set to run at 1350 MHz through a 128-bit bus. It also is made up of 640 Stream Processors, 40 TAUs, 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 speaking, the GeForce 9800 GX2 will be 48% faster than the GeForce GTX 750 Ti in general, due to its higher bandwidth. (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 quite a bit (about 88%) faster with regards to texture 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

If using high levels of AA is important to you, then the GeForce 9800 GX2 is the winner, but it probably won't make a huge difference. (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 information (counted in MB per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 applied in one second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines 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 fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.