Radeon HD 5670 vs Radeon HD 6850

Intro

Compare those specifications to the Radeon HD 6850, which uses a 40 nm design. AMD has set the core frequency at 775 MHz. The GDDR5 memory works at a frequency of 1000 MHz on this particular card. It features 960 SPUs along with 48 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
Radeon HD 6850		127 Watts
	Difference: 66 Watts (108%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6850 should theoretically be much better than the Radeon HD 5670 overall. (explain)

Radeon HD 6850		128000 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 64000 (100%)

Texel Rate

The Radeon HD 6850 is much (approximately 140%) better at AF than the Radeon HD 5670. (explain)

Radeon HD 6850		37200 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 21700 (140%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6850 is superior to the Radeon HD 5670, and very much so. (explain)

Radeon HD 6850		24800 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 18600 (300%)

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 max amount of data (counted in MB per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, it must 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 AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units of the card 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core speed of the card. 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 output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.