GeForce 9800 GX2 vs Radeon HD 6750 1GB

Intro

Compare those specs to the Radeon HD 6750 1GB, which comes with core speeds of 725 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 720 SPUs along with 36 TAUs and 16 ROPs.

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

As far as performance goes, the GeForce 9800 GX2 should in theory be much better than the Radeon HD 6750 1GB overall. (explain)

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

Texel Rate

The GeForce 9800 GX2 should be a lot (approximately 194%) more effective at anisotropic 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

The GeForce 9800 GX2 will be much (about 66%) faster with regards to FSAA than the Radeon HD 6750 1GB, and should be capable of handling higher resolutions while still performing well. (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 largest amount of data (in units of megabytes per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is calculated 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

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