GeForce 8800 GTS (G92) vs Radeon HD 6790

Intro

Compare all of that to the Radeon HD 6790, which has GPU core speed of 840 MHz, and 1024 MB of GDDR5 memory set to run at 1050 MHz through a 256-bit bus. It also is comprised of 800 Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G92)		135 Watts
Radeon HD 6790		150 Watts
	Difference: 15 Watts (11%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6790 should theoretically be much superior to the GeForce 8800 GTS (G92) in general. (explain)

Radeon HD 6790		134400 MB/sec
GeForce 8800 GTS (G92)		62080 MB/sec
	Difference: 72320 (116%)

Texel Rate

The GeForce 8800 GTS (G92) is quite a bit (approximately 24%) better at texture filtering than the Radeon HD 6790. (explain)

GeForce 8800 GTS (G92)		41600 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 8000 (24%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6790 is the winner, by far. (explain)

Radeon HD 6790		13440 Mpixels/sec
GeForce 8800 GTS (G92)		10400 Mpixels/sec
	Difference: 3040 (29%)

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 (in units of megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. 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 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.