GeForce 8800 GT 512MB vs Radeon HD 4670 1GB

Intro

Compare those specifications to the Radeon HD 4670 1GB, which has clock speeds of 750 MHz on the GPU, and 1100 MHz on the 1024 MB of GDDR4/GDDR3/DDR3/DDR2 memory. It features 320(64x5) SPUs along with 32 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 1GB		70 Watts
GeForce 8800 GT 512MB		105 Watts
	Difference: 35 Watts (50%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 GT 512MB is 64% quicker than the Radeon HD 4670 1GB overall, because of its higher data rate. (explain)

GeForce 8800 GT 512MB		57600 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 22400 (64%)

Texel Rate

The GeForce 8800 GT 512MB is much (approximately 40%) better at AF than the Radeon HD 4670 1GB. (explain)

GeForce 8800 GT 512MB		33600 Mtexels/sec
Radeon HD 4670 1GB		24000 Mtexels/sec
	Difference: 9600 (40%)

Pixel Rate

The GeForce 8800 GT 512MB is quite a bit (approximately 60%) faster with regards to FSAA than the Radeon HD 4670 1GB, and capable of handling higher resolutions without slowing down too much. (explain)

GeForce 8800 GT 512MB		9600 Mpixels/sec
Radeon HD 4670 1GB		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 largest amount of information (in units of megabytes per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. 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 texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.