Asus P5B - Manual (Page 21)

ASUS P5B Premium Series 1-5
ASUS Quiet Thermal Solution
ASUS Quiet Thermal solution makes system more stable and enhances the
overclocking capability.
AI Gear
AI Gear provides four modes that adjust the CPU frequency and Vcore
voltage minimizing system noise and power consumption. You can choose
the mode that best suits your computing needs. See page 5-19 for details.
AI Nap
With AI Nap, the system can continue running at minimum power and noise
when you are temporarily away. To wake the system and return to the OS
environment, simply click the mouse or press a key. See page 5-20 for
details.
8-Phase Power Design
The ASUS 8-Phase Power Design provides highly efficient operation to
generate less heat (at least 15°C (59°F)) than other conventional power
solutions. It reduces input ripple current and output ripple voltage, which
keeps CPU and power module from suffering the risk of high power stress.
It has the advantages of quick transient response and stability, especially
beneficial when CPU requires more current immediately under heavy loading
or overclocking mode.
Fanless Design - Stack Cool 2
ASUS Stack Cool 2 is a fan-less and zero-noise cooling solution that lowers
the temperature of critical heat generating components. The motherboard
uses a special design on the printed circuit board (PCB) to dissipate heat
these critical components generate.
Fanless Design - Heat-pipe
The Heat Pipe design effectively directs the heat generated by the chipsets to
the heatsink near the back IO ports, where it can be carried away by existing
airflow from CPU fan or bundled optional fan. The purpose of the innovative
heat pipe design on this motherboard is that the groundbreaking fanless
design does not have lifetime problems as a chipset fan does. Furthermore, it
provides options for users to install side-flow fan or passive cooler. The Heat
Pipe design is the most reliable fanless thermal solution to date.