Computer:
HP Pavilion a720n
Athlon XP+ 2.2Ghz
448MB RAM (512; but onboard video takes 64MB)

Monitor:
HP mx703

Issue:
No matter whether I specify 70 or 80Hz with vsync or xvrefresh the monitor stays at a annoying 60Hz.

Anybody know what I can do?

EDIT: Things like "Screen resize & rotate" it says it's set to "85Hz" but again the monitor is at 60Hz. The monitor's information menu says it's set to 60Hz.
Thanks in Advance!