I have some news.
I think I have nailed the final coffin on this matter(you could all call me triangle slayer
)
I have meneged to bring my old PC up and running. it is an:
Intel P4, 3.0Ghz
Intel D-865Perl Mainboard
Radeon X800
a freshly nstalled WinXp
I have tried Drivers 7.4 8.3 and 8.4.
7.4 worked perfectly while the later two showed the triangles.
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System:
Main board:GA-P35-DS3L
Intel Core 2 duo E8400 3.0Ghz clocked as 3.26Ghz
4GB DDR2 800Mhz RAM Clocked as 871Mhz
VGA: Asus Radeon HD 2900XT
Windows Vista Ultimate 64bit/Windows XP pro in Dual boot