GeForce 8800 Ultra vs Radeon HD 6750 1GB

Intro

Compare all that to the Radeon HD 6750 1GB, which has a GPU core clock speed of 725 MHz, and 1024 MB of GDDR5 RAM running at 1000 MHz through a 128-bit bus. It also is made up of 720 Stream Processors, 36 Texture Address Units, 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 8800 Ultra		171 Watts
	Difference: 85 Watts (99%)

Memory Bandwidth

Theoretically, the GeForce 8800 Ultra should perform quite a bit faster than the Radeon HD 6750 1GB overall. (explain)

GeForce 8800 Ultra		103680 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 39680 (62%)

Texel Rate

The GeForce 8800 Ultra is a lot (more or less 50%) faster with regards to anisotropic filtering than the Radeon HD 6750 1GB. (explain)

GeForce 8800 Ultra		39168 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 13068 (50%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce 8800 Ultra is a better choice, by a large margin. (explain)

GeForce 8800 Ultra		14688 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 3088 (27%)

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.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 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 anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total amount of texture units of the card 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.