GeForce 9800 GT 1GB vs Radeon HD 5670

Intro

Compare all of that to the Radeon HD 5670, which has a GPU core clock speed of 775 MHz, and 1024 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also features 400(80x5) SPUs, 20 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
GeForce 9800 GT 1GB		105 Watts
	Difference: 44 Watts (72%)

Memory Bandwidth

In theory, the Radeon HD 5670 should be a little bit faster than the GeForce 9800 GT 1GB overall. (explain)

Radeon HD 5670		64000 MB/sec
GeForce 9800 GT 1GB		57600 MB/sec
	Difference: 6400 (11%)

Texel Rate

The GeForce 9800 GT 1GB is much (more or less 117%) more effective at texture filtering than the Radeon HD 5670. (explain)

GeForce 9800 GT 1GB		33600 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 18100 (117%)

Pixel Rate

The GeForce 9800 GT 1GB is much (approximately 55%) faster with regards to full screen anti-aliasing than the Radeon HD 5670, and also will be capable of handling higher resolutions more effectively. (explain)

GeForce 9800 GT 1GB		9600 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 3400 (55%)

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. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

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