Geforce GTX 680 vs Radeon HD 5670

Intro

Compare all of that to the Radeon HD 5670, which has clock speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 400(80x5) SPUs as well as 20 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
Geforce GTX 680		195 Watts
	Difference: 134 Watts (220%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 680 should be 200% quicker than the Radeon HD 5670 overall, due to its greater data rate. (explain)

Geforce GTX 680		192256 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 128256 (200%)

Texel Rate

The Geforce GTX 680 should be much (more or less 731%) better at AF than the Radeon HD 5670. (explain)

Geforce GTX 680		128768 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 113268 (731%)

Pixel Rate

The Geforce GTX 680 should be quite a bit (about 419%) faster with regards to AA than the Radeon HD 5670, and will be capable of handling higher screen resolutions while still performing well. (explain)

Geforce GTX 680		32192 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 25992 (419%)

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 data (measured in MB per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units of the card by the core clock 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 per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core 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 fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.