"Thierry" <: -> wrote in message news:441180a8$1@news.vo.lu...
> Hi,
>
> A technical question about video board.
>
I have partly the answer looking in HDR file format which allows much better
renderings and image processing than a standard 8 bits fixed dataset.

Thierry

> The human eye detects 256 level of gray. Applied to RGB channels, it is
> able to see 256x256x256 = 16.77 millions colors, so as much as a 24-bit
> card (2^24 = 16.77 millions)
>
> Question : why do we sale 32-bit card is 24-bit is enough (in another
> field, 24-bit audio board are common, but for other reasons)
> It is not because the bus is 32-bit or because the processing or the OS
> works on 32-bit.
> It seems that the reaon is other...
>
> Aany idea ?
>
> Thanks
> Thierry
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