DirectX10 will work with the 8800 series cards only right now. That is
for the hardware functions.
If you use a DX10 game, they have a compatibility that allows them to
use DX9 features.
If you have an older DX9 video card, you can run the DX10 games with
DX10 on your PC, but you will not get the additional DX10 graphical
features. It will just look different.
Question then. I am running Vista Home Premium. I haven't seen any DX updates
in Windows Update. But I noticed that there is a Feb Update for DirectX 9.
Should I be installing this? Or will it have a negative effect on my DirectX
10, in which case I should be waiting for Direct X 10 updates?
I don't have a DX10 card, if it makes any difference (Radeon X1600)
The DX9/0c updates will not appear in windowsupdate, as it's not an critical
or arguanle essential update for most people.
Yes you can install it, I've installed several different iterations of the
updates and games like FEAR will not run unless you apply at least one of
these updates.
DX9 and DX10 run independant of each other.
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