GeForce 9800 GX2 vs Radeon HD 6750 1GB

Intro

Compare all of that to the Radeon HD 6750 1GB, which features a core clock speed of 725 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 128-bit bus, and makes use of a 40 nm design. It is comprised of 720 SPUs, 36 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
GeForce 9800 GX2		197 Watts
	Difference: 111 Watts (129%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GX2 should theoretically be much better than the Radeon HD 6750 1GB in general. (explain)

GeForce 9800 GX2		128000 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 64000 (100%)

Texel Rate

The GeForce 9800 GX2 will be much (more or less 194%) more effective at texture filtering than the Radeon HD 6750 1GB. (explain)

GeForce 9800 GX2		76800 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 50700 (194%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce 9800 GX2 is superior to the Radeon HD 6750 1GB, and very much so. (explain)

GeForce 9800 GX2		19200 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 7600 (66%)

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 max amount of information (measured in megabytes per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.