GeForce 8800 GTS (G80) 320MB vs Radeon HD 6770 1GB

Intro

Compare that to the Radeon HD 6770 1GB, which comes with GPU core speed of 900 MHz, and 1024 MB of GDDR5 RAM set to run at 1050 MHz through a 128-bit bus. It also is comprised of 800 Stream Processors, 40 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 6770 1GB		108 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 35 Watts (32%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6770 1GB is 6% faster than the GeForce 8800 GTS (G80) 320MB in general, because of its higher data rate. (explain)

Radeon HD 6770 1GB		67200 MB/sec
GeForce 8800 GTS (G80) 320MB		63360 MB/sec
	Difference: 3840 (6%)

Texel Rate

The Radeon HD 6770 1GB is a lot (approximately 46%) faster with regards to anisotropic filtering than the GeForce 8800 GTS (G80) 320MB. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
	Difference: 11376 (46%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6770 1GB is a better choice, and very much so. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
	Difference: 4140 (40%)

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 MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better 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 texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.