GeForce 9800 GX2 vs GeForce GTX 750

Intro

Compare those specs to the GeForce GTX 750, which features GPU core speed of 1020 MHz, and 1024 MB of GDDR5 memory set to run at 1250 MHz through a 128-bit bus. It also features 512 SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750		55 Watts
GeForce 9800 GX2		197 Watts
	Difference: 142 Watts (258%)

Memory Bandwidth

The GeForce 9800 GX2 should in theory be a lot faster than the GeForce GTX 750 in general. (explain)

GeForce 9800 GX2		128000 MB/sec
GeForce GTX 750		80000 MB/sec
	Difference: 48000 (60%)

Texel Rate

The GeForce 9800 GX2 will be much (more or less 135%) better at AF than the GeForce GTX 750. (explain)

GeForce 9800 GX2		76800 Mtexels/sec
GeForce GTX 750		32640 Mtexels/sec
	Difference: 44160 (135%)

Pixel Rate

The GeForce 9800 GX2 should be a little bit (approximately 18%) better at FSAA than the GeForce GTX 750, and will be capable of handling higher screen resolutions while still performing well. (explain)

GeForce 9800 GX2		19200 Mpixels/sec
GeForce GTX 750		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 maximum amount of data (counted in megabytes per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.