GeForce 8800 GTS (G80) 640MB vs Radeon HD 6670 (OEM)

Intro

Compare those specs to the Radeon HD 6670 (OEM), which features GPU clock speed of 800 MHz, and 512 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also is made up of 480 Stream Processors, 24 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM)		63 Watts
GeForce 8800 GTS (G80) 640MB		143 Watts
	Difference: 80 Watts (127%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6670 (OEM) should in theory be a small bit superior to the GeForce 8800 GTS (G80) 640MB in general. (explain)

Radeon HD 6670 (OEM)		64000 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 640 (1%)

Texel Rate

The GeForce 8800 GTS (G80) 640MB is much (approximately 28%) faster with regards to anisotropic filtering than the Radeon HD 6670 (OEM). (explain)

GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
Radeon HD 6670 (OEM)		19200 Mtexels/sec
	Difference: 5424 (28%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce 8800 GTS (G80) 640MB is superior to the Radeon HD 6670 (OEM), by far. (explain)

GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
Radeon HD 6670 (OEM)		6400 Mpixels/sec
	Difference: 3860 (60%)

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 information (counted in MB per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.