Windows 7: Monitor supports 85hz but displays only 75hz

My asus lcd monitor supports 85hz but when I press on 85 hz it says ´out of range´. I enabled the ´hide modes that this computer cannot show´, so it obviously supports 85hz.
In xp I could get at up to 120 hz.
I have ati radeon asus eah3450. I´ve read that Windows 7 doesn´t support refresh rates higher than 75hz. Is this true? If yes, how to disable it?

wat resolution are you running at?

I am running at 75 Hz, the computer won´t allow more.

Windows 7 Ultimate, Intel(R) Core(TM)2Duo CPU 3.00 GHz; Processor 2.00 GB; 32-bit; ATI Radeon HD 3400 Series 512 MB

Make and model number of the monitor would help.

It is on this link ASUSTeK Computer Inc. - ASUS - ASUS VW195S

Actually no, your monitor supports up to 75Hz (vertically) which is the same thing you're getting from Windows.

The 85Hz is Horizontally.

You're running at max Hz your monitor supports, leave it like that and be happy

Btw, how could you have had "up to 120Hz in Windows XP" in that monitor if the specifications on the ASUS Website are not wrong, they clearly state:

Sounds to me like you had the "List modes that are not supported on this monitor" in Windows XP, or the ASUS people are really weird.

That's the 2 things that comes to my mind right now

Cheers

Thank you all.