Monitor refresh rates
I have had a bit of the same problem... OK the only thing that is the same is the fact we are both using OS X and and an OEM ATI Rage card. I have a G4 450 DP with an additional IX Micro Ultimate Rez card installed pre-OS X.
My problem is that I cannot change the refresh rates to known good rates that I can use in OS 9.1. These known good rates are listed below:
NEC MultiSync XV17+ on OEM ATI Rage Pro 16 MB AGP
1024x768 @ 100Hz
1024x768 @ 90Hz
Apple Multiple Scan 15av on IX Micro Ultimate Rez 8 MB PCI
1024x768 @ 74.9Hz
The only refresh rates listed are either unholy to use either because of flicker or because of a visible line running up (NEC) or down (Apple) the screen.
I have found that if I boot into OS X with the monitors powered off one or two more options are available but that solution is unsatisfactory as it resets on reboot, many of the refresh rates are still unavailable, and I should just not have to do this.
Any help would be appreciated.
:: THERBIS BAEWOTNEM OCERGELIS AEDERPHOP RONDERHASM ::