GeForce 9800 GX2 vs GeForce GTX 750

Intro

Compare those specifications to the GeForce GTX 750, which makes use of a 28 nm design. nVidia has clocked the core speed at 1020 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this particular card. It features 512 SPUs as well as 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 theoretically perform much 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 a lot (more or less 135%) more effective at texture filtering 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 is just a bit (approximately 18%) better at anti-aliasing than the GeForce GTX 750, and capable of handling higher screen 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 largest amount of information (measured in megabytes per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics 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 video 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 amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.