The Asus P5Q Deluxe does come with a significant amount of BIOS Settings, and it might look pretty intimidating to new overclockers. It's been noted that the GTL REF adjustments actually works on the P5Q Deluxe, something new for Asus' Intel-based boards.

BIOS Settings Range Increment
CPU Voltage (Max 1.75V, 2.1V if OV_CPU jumper is enabled) 0.8500V-2.100V 0.00625V
CPU GTL Voltage Reference (Core 0/Core2) 0.370x-0.760x (standard 0.630x) 0.005x
CPU GTL Voltage Reference (Core 1/Core3) 0.410x-0.800x (standard 0.670x) 0.005x
CPU PLL Voltage 1.5V-2.78V (standard 1.5V) 0.02V
FSB Termination Voltage 1.20V-1.90V (1.1V for 45nm, 1.2V for others) 0.02V
DRAM Voltage 1.80V-3.08V 0.02V
NB Voltage 1.10V-1.76V (2.06V if OV-NB jumper is enabled) 0.02V
NB GTL Voltage 0.370x-0.760x (standard 0.630x) 0.005x
SB Voltage 1.10V-1.40V 0.10V
PCIE SATA Voltage 1.50V-1.80V 0.10V