GeForce 8800 GS vs Radeon HD 6770 1GB

Intro

Compare those specs to the Radeon HD 6770 1GB, which has core clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 800 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GS		105 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 3 Watts (3%)

Memory Bandwidth

The Radeon HD 6770 1GB should in theory perform quite a bit faster than the GeForce 8800 GS overall. (explain)

Radeon HD 6770 1GB		67200 MB/sec
GeForce 8800 GS		38400 MB/sec
	Difference: 28800 (75%)

Texel Rate

The Radeon HD 6770 1GB should be much (more or less 36%) faster with regards to anisotropic filtering than the GeForce 8800 GS. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce 8800 GS		26400 Mtexels/sec
	Difference: 9600 (36%)

Pixel Rate

The Radeon HD 6770 1GB should be quite a bit (approximately 118%) faster with regards to FSAA than the GeForce 8800 GS, and should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce 8800 GS		6600 Mpixels/sec
	Difference: 7800 (118%)

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 largest amount of data (counted in megabytes per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few 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.