GeForce 8800 GT 512MB vs Radeon HD 4670 512MB

Intro

Compare all of that to the Radeon HD 4670 512MB, which comes with GPU clock speed of 750 MHz, and 512 MB of GDDR4/GDDR3/DDR3/DDR2 RAM set to run at 1000 MHz through a 128-bit bus. It also features 320(64x5) Stream Processors, 32 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
GeForce 8800 GT 512MB		105 Watts
	Difference: 35 Watts (50%)

Memory Bandwidth

Theoretically, the GeForce 8800 GT 512MB should perform quite a bit faster than the Radeon HD 4670 512MB overall. (explain)

GeForce 8800 GT 512MB		57600 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 25600 (80%)

Texel Rate

The GeForce 8800 GT 512MB should be quite a bit (about 40%) faster with regards to anisotropic filtering than the Radeon HD 4670 512MB. (explain)

GeForce 8800 GT 512MB		33600 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 9600 (40%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce 8800 GT 512MB is superior to the Radeon HD 4670 512MB, and very much so. (explain)

GeForce 8800 GT 512MB		9600 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 3600 (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 largest amount of data (measured in megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR 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 higher this number, the better the 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 the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. 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 output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.