GeForce 9800 GX2 vs GeForce GTX 750

Intro

Compare those specifications to the GeForce GTX 750, which uses a 28 nm design. nVidia has set the core speed at 1020 MHz. The GDDR5 memory works at a speed of 1250 MHz on this particular model. It features 512 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

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

Theoretically, the GeForce 9800 GX2 should perform quite a bit 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 quite a bit (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 just a bit (approximately 18%) faster with regards to FSAA than the GeForce GTX 750, and capable of handling higher resolutions without losing too much performance. (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: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.