Asus P7H55D-M EVO LGA1156 microATX Motherboard

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For enthusiasts, the options available within the BIOS can make a good board, a great one. The ability to manipulate frequencies, voltages, and fan control settings vary depending on the hardware and the amount of trust placed in the user's hands by the manufacturer.

"Ai Tweaker" menu with maximum values entered.

"AI Tweaker" menu, continued.

"Hardware Monitor" menu.

BIOS Summary: Asus P7H55D-M EVO
BLCK Frequency (CPU)
80 MHz to 500 MHz
CPU Voltage
-Fixed: 0.85V to 1.70V in 0.00625V increments
-Offset: 0.00625V to 0.50000V in 0.00625V increments
QPI Frequency
3200MHz to 6400MHz in 533MHz increments
IMC Voltage
1.10V to 1.90V in 0.02V increments
(1.10V default)
PCH Voltage
1.05V to 2.00V in 0.01V increments
(1.05V default)
DRAM Frequency
800MHz, 1066MHz, 1333MHz
(for Core i5-661)
DRAM Voltage
1.20V to 2.20V in 0.02V increments
Memory Timing Control
Integrated Graphics
iGPU Voltage
0.5000V to 1.7500V in 0.0125V increments
iGPU Graphics Mode
32MB, 64MB, 128MB
iGPU Frequency
133MHz to 1500MHz in 33MHz increments
DVMT Memory
(XP only setting)
128MB, 256MB, Maximum DVMT
Fan Control
CPU Q-Fan Control
Standard, Silent, Turbo, Manual
Manual Settings (CPU Fan)
-CPU Upper Temperature: 40°C to 90°C in 10°C increments
-CPU Lower Temperature: 40°C (fixed)
-Maximum Fan Duty Cycle: 20% to 100% in 10% increments
-Minimum Fan Duty Cycle: 00% to 100% in 10% increments
Chassis Q-Fan Control
Standard, Silent, Turbo

The BIOS allows for frequency/voltage modification of all the main components (CPU, DRAM, chipset, IGP) with liberal limits; it should be enough to satisfy overclockers and undervolters alike. Both of the board's fan headers can be controlled using Asus' Q-Fan feature. There are three pre-configured settings as well as manual options for the CPU fan header only. In manual mode the maximum and minimum fan speed can be set as well as the upper CPU temperature.

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