GeForce 8800 Ultra vs Radeon HD 6750 1GB

Intro

Compare those specifications to the Radeon HD 6750 1GB, which comes with a core clock speed of 725 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It features 720 SPUs, 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 8800 Ultra		171 Watts
	Difference: 85 Watts (99%)

Memory Bandwidth

As far as performance goes, the GeForce 8800 Ultra should in theory be a lot better 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 will be a lot (approximately 50%) faster with regards to AF 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

The GeForce 8800 Ultra will be quite a bit (about 27%) faster with regards to FSAA than the Radeon HD 6750 1GB, and also capable of handling higher resolutions more effectively. (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: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 can be processed in one second. This is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

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