| Silent X Technology
The XPC SB81P
proudly wears the Silent X technology logo. The Silent X concept is embodied in a number
of discreet Shuttle technologies, including; A Silent X PSU, Integrated Cooling Engine
(ICE); and intelligently-engineered airflow mechanics.
Integrated Cooling Engine (ICE) Module
The Integrated Cooling Engine (ICE) included in the SB81P has
been purpose designed for the P-chassis. The Integrated Cooling Engine uses convection
cooling to transfer heat away from the processor and other critical system components.
Copper tubing, coated in nickel and filled with distilled water provide the conduit
through which heat the radiator, providing both processor cooling an passes to a radiator.
Improving on the standard ICE module that ships with all G-series
XPCs, the P-series ICE module uses two fans in push-pull to more efficiently pass cool air
over the ICE radiators fins. This makes it possible to deliver up to 50CFM. Further both
fans are PWM spec which means linear control of the fan speed and
controllable in BIOS.
Finally, those familiar with the XPC will notice that the ICE module
has moved to the front of the case and the airflow has been redirected to exhaust on the
left side of the machine. A Fan duct channels the intake airflow to ensure cool air is
used to cool the CPU and a foam duct on the case makes sure the exhaust directly exits the
case without warming other components.
350 Watt Power Supply
The SB81P takes a giant leap in the PSU department, delivering 100 Watts more than
previous PSUs whilst maintaining whisper quiet operation. Tested in our acoustic lab from
a distance of 50cm to create an environment similar to actual usage (many competitors take
measurements at 1M), the PSU operates at just 27dB.
The XPC SB81P introduces a revolutionary new approach to airflow design. Separating the
machine into 3 airflow zones:
The P-chassis ensures that cool air is delivered to critical components.
The airflow in the P-chassis shows several different intake points
designed to keep cool air continually flowing over critical components as opposed to
recalculating warm stale air.
Finally, the underside of the P-chassis has more air intake points
designed to keep the motherboard cool and stable. The underside edge is lined with intake
points. Other intake points are also located on the underside of the machine to improve
The XPC SB81P contains a total of 5-cooling fans. These fans are located in airflow zones
- Two 60mm fans cool the two hard drives located at the top of the
machine. These fans feature 4-pin headers, are PWM spec and feature linear control via
BIOS. These fans are designed to spin slowly at about 1,000 rpm, enough to cool the HDD
but not be heard.
- As mentioned earlier, two BIOS controlled fans in push-pull cool the
CPU. Again these fans are PWM spec and designed to run at low speeds.
- The final fan in the system is a 80mm fan located inside the PSU. This
fan serves to cool the chassis, motherboard and PSU.