GeForce 8800 GT 256MB vs Radeon HD 6670 (OEM)

Intro

Compare those specifications to the Radeon HD 6670 (OEM), which has a GPU core clock speed of 800 MHz, and 512 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also is comprised of 480 Stream Processors, 24 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM)		63 Watts
GeForce 8800 GT 256MB		105 Watts
	Difference: 42 Watts (67%)

Memory Bandwidth

The Radeon HD 6670 (OEM) should theoretically be quite a bit faster than the GeForce 8800 GT 256MB in general. (explain)

Radeon HD 6670 (OEM)		64000 MB/sec
GeForce 8800 GT 256MB		44800 MB/sec
	Difference: 19200 (43%)

Texel Rate

The GeForce 8800 GT 256MB should be much (more or less 75%) more effective at texture filtering than the Radeon HD 6670 (OEM). (explain)

GeForce 8800 GT 256MB		33600 Mtexels/sec
Radeon HD 6670 (OEM)		19200 Mtexels/sec
	Difference: 14400 (75%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce 8800 GT 256MB is the winner, by far. (explain)

GeForce 8800 GT 256MB		9600 Mpixels/sec
Radeon HD 6670 (OEM)		6400 Mpixels/sec
	Difference: 3200 (50%)

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 maximum amount of data (in units of MB per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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