GeForce 8800 Ultra vs Radeon HD 6770 1GB

Intro

Compare that to the Radeon HD 6770 1GB, which comes with core clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
GeForce 8800 Ultra		171 Watts
	Difference: 63 Watts (58%)

Memory Bandwidth

The GeForce 8800 Ultra, in theory, should be a lot faster than the Radeon HD 6770 1GB overall. (explain)

GeForce 8800 Ultra		103680 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 36480 (54%)

Texel Rate

The GeForce 8800 Ultra is a bit (approximately 9%) faster with regards to AF than the Radeon HD 6770 1GB. (explain)

GeForce 8800 Ultra		39168 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 3168 (9%)

Pixel Rate

If using a high resolution is important to you, then the GeForce 8800 Ultra is the winner, but not by far. (explain)

GeForce 8800 Ultra		14688 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 288 (2%)

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 max amount of data (measured in megabytes per second) that can be transported 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. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs 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 is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.