Disclaimer
Running a monitor out of spec could damage its components, proceed at your own risk.
Overclocking Tutorial
Diamondtron HSync & VSync Unlocking Tutorial (NOTE: Only works on 22" SB monitors):
- Turn off the monitor.
- Turn on the monitor while holding the EXIT button until you see a raster image then release and press EXIT again and you will see the FACT DATA menu.
- Press the (-) button once to set the data value to 255 then press the (+) button to set the data value to 5 then press the SELECT button.
- Navigate to the right in the OSD menu until you find the FACT DATA menu again.
- Press the (+) button until the DATA value is set to 99 then press the SELECT button.
- Press either the (◀) or (▶) buttons and you will be introduced to the FACT DATA-E2P menu.
- Cycle through ADDR to change DATA values:
- Change DATA Decimal in ADDR 004 to adjust the HSync Minimum +1 (31 is 30kHz)
- Change DATA Decimal in ADDR 005 to adjust the HSync Maximum +1 (141 is 140kHz)
- Change DATA Decimal in ADDR 006 to adjust the VSync Minimum +1 (49 is 48Hz)
- Change DATA Decimal in ADDR 007 to adjust the VSync Maximum +1 (161 is 160Hz)
- Press the EXIT button after each ADDR modification to save each address value then enter the FACT DATA-E2P menu again to change other ADDR values.
- Exit the OSD.
Notes
- This tutorial only applies for 22" Diamondtron SB monitors (and their rebadges) such as the 230SB and 2070SB.
- The maximum known limit for VSync and HSync is 254Hz and 154khz respectively.
- The minimum known limit for VSync and HSync is unknown. HSync possibly has a lower limit of 24kHz, which would support the NEC PC-9801 video mode. Testing required.
- This tutorial does not need any additional equipment unlike Sony's WinDAS.