GeForce 8800 GT 512MB vs Radeon HD 4670 512MB

Intro

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

Display Graphs

Hide Graphs

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 speaking, the GeForce 8800 GT 512MB should be much faster than the Radeon HD 4670 512MB in general. (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 will be much (about 40%) better at 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 using lots of anti-aliasing is important to you, then the GeForce 8800 GT 512MB is superior to the Radeon HD 4670 512MB, by a large margin. (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: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better 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 maximum amount of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.