> We've proven that the performance decrease is caused by the use of
> dualhead. In windows with the same card in my friend's computer i
> believe it blacks out and may turn off the second head while playing
> video in the first or games in the first. I'm not entirely sure about
> that though, i've only seen it a couple times. Anyway, is anyone
> getting better results with a video player in a dualhead setup?
>
You have got to remember when you are running dual head from one
card as opposed to two that you dont have 2x all the components
on the card. The gfx chipset has to draw 2x screens, the ramdac
has to read the memory 2x and the computer has to shift 2x data across
the PCI/AGP bus. All these will contribute to the slowdown with
the ramdac reading memory twice probably being the bigest hit as
memory needs a recovery time after every read/write.
Graeme
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