GeForce 8800 GT 512MB vs Radeon HD 6750

Intro

Compare all of that to the Radeon HD 6750, which comes with clock speeds of 725 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 memory. It features 720 SPUs as well as 36 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
GeForce 8800 GT 512MB		105 Watts
	Difference: 19 Watts (22%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6750 should be 11% faster than the GeForce 8800 GT 512MB overall, because of its higher bandwidth. (explain)

Radeon HD 6750		64000 MB/sec
GeForce 8800 GT 512MB		57600 MB/sec
	Difference: 6400 (11%)

Texel Rate

The GeForce 8800 GT 512MB will be quite a bit (approximately 29%) better at anisotropic filtering than the Radeon HD 6750. (explain)

GeForce 8800 GT 512MB		33600 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 7500 (29%)

Pixel Rate

The Radeon HD 6750 will be a lot (approximately 21%) more effective at full screen anti-aliasing than the GeForce 8800 GT 512MB, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 6750		11600 Mpixels/sec
GeForce 8800 GT 512MB		9600 Mpixels/sec
	Difference: 2000 (21%)

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 maximum amount of data (in units of MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 are applied in one second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated 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 output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.