GeForce 8800 Ultra vs Radeon HD 6670 (OEM)

Intro

Compare those specifications to the Radeon HD 6670 (OEM), which uses a 40 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 memory runs at a frequency of 1000 MHz on this card. It features 480 SPUs as well as 24 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM)		63 Watts
GeForce 8800 Ultra		171 Watts
	Difference: 108 Watts (171%)

Memory Bandwidth

The GeForce 8800 Ultra should theoretically perform quite a bit faster than the Radeon HD 6670 (OEM) in general. (explain)

GeForce 8800 Ultra		103680 MB/sec
Radeon HD 6670 (OEM)		64000 MB/sec
	Difference: 39680 (62%)

Texel Rate

The GeForce 8800 Ultra should be quite a bit (about 104%) faster with regards to anisotropic filtering than the Radeon HD 6670 (OEM). (explain)

GeForce 8800 Ultra		39168 Mtexels/sec
Radeon HD 6670 (OEM)		19200 Mtexels/sec
	Difference: 19968 (104%)

Pixel Rate

The GeForce 8800 Ultra should be a lot (approximately 130%) better at anti-aliasing than the Radeon HD 6670 (OEM), and will be able to handle higher screen resolutions more effectively. (explain)

GeForce 8800 Ultra		14688 Mpixels/sec
Radeon HD 6670 (OEM)		6400 Mpixels/sec
	Difference: 8288 (130%)

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 (measured in megabytes per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. 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 texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could 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 clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.