GeForce 8800 GS vs Radeon HD 4670 512MB

Intro

Compare that to the Radeon HD 4670 512MB, which uses a 55 nm design. AMD has set the core frequency at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 memory runs at a speed of 1000 MHz on this card. It features 320(64x5) SPUs as well as 32 TAUs and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically, the GeForce 8800 GS should perform a small bit faster than the Radeon HD 4670 512MB in general. (explain)

GeForce 8800 GS		38400 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 6400 (20%)

Texel Rate

The GeForce 8800 GS should be a bit (approximately 10%) faster with regards to texture filtering than the Radeon HD 4670 512MB. (explain)

GeForce 8800 GS		26400 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 2400 (10%)

Pixel Rate

The GeForce 8800 GS is a small bit (about 10%) faster with regards to FSAA than the Radeon HD 4670 512MB, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce 8800 GS		6600 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 600 (10%)

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 max amount of information (measured in MB per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number 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 outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.