Asus P5Q - Manual (Page 47)

ASUS P5Q 2-21
2. CPU / Northbridge overvoltage setting (3-pin OV_CPU, 3-pin OV_NB)
These jumpers allow you to enable or disable the advanced CPU and
Northbridge overvoltage settings in BIOS. Read the following information
before you change the jumper settings. Set to pins 1-2 to activate the
advanced CPU / Northbridge overvoltage feature.
• Before you change the jumper settings for extra-high overvoltage ability,
use the BIOS items introduced in 3.4 Ai Tweaker menu first to adjust
the desired CPU and Northbridge performance. Make sure your system
function well under the highest BIOS voltage settings before you change
the setting of these two jumpers.
• Refer to 3.4 Ai Tweaker menu for more information about CPU and
Northbridge overvoltage settings.
• DO NOT set the OV_CPU jumper to pins 1-2 when you install a new CPU
and have not booted for the first time. Doing so may cause the system to
halt. For system failure due to the wrong setting of the OV_CPU jumper,
shut down the computer and move the cap back to pins 2-3.
• The system may need a better cooling system (for example, a water-cooling
system) to work stably under high voltage settings.
OV_CPU OV_NB
Pins 2-3 (Default) up to 1.70V up to 1.76V
Pins 1-2 (OV Enabled) up to 2.10V up to 2.20V