User's Manual
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Caution: Only use the supplied cable set� Using cables that were not included (e�g� cables of older power
supply unit series) may lead to defects!
First remove your old power supply. To do so, proceed as follows:
∙ Carefully disconnect your PC from any power sources and unplug all cables connected to the PC�
∙ Open the PC case, taking care to follow the manufacturer’s instructions�
∙ Disconnect all plugs from the motherboard and all other components, such as FDDs, HDDs, or optical
drives� Make sure that there are no plugs from the old power supply connected to any of the components�
∙ Now remove the screws at the rear of the power supply and carefully pull the power supply out of the PC
case� Take special care that no cables get caught in the components and damage them�
Fitting your new be quiet! Straight Power 11 power supply:
∙ Place the new power supply in the space provided in the PC case and connect to the rear panel using the
four screws provided� Do not use excessive force�
∙ Plug the 20/24 pin connector into the socket provided on the motherboard� If you have a 24 pin connection,
place the remaining 4 pins in the correct position before you plug the connector into the socket� If you have
a motherboard with a 20 pin connector, fold the additional 4 pins to one side�
∙ Now plug the 12V-P4 or P8 connector for the CPU into the socket provided on the motherboard�
5. SAFETY FUNCTIONS
All be quiet! power supplies have numerous safety functions� They are designed to protect the power supply
and the components connected to it against damage� If one of these safeguards is triggered, the system will
reboot or power o in most cases. If this happens, you should immediately check the PC for errors.
For more info on troubleshooting see the “Troubleshooting” chapter�
The be quiet! Straight Power 11 series has the following safety functions:
OCP (Over current protection)
If the load on the individual circuits exceeds the specied limit, the power supply is automatically switched o.
UVP (Undervoltage protection)
This safeguard is triggered if the voltage on the circuits drops below a certain limit� The power supply is
automatically switched o in this case.
OVP (Overvoltage protection)
The overvoltage safeguard is triggered if the voltage in the circuits is too high; the power supply is deactivated.
SCP (Short circuit safeguard)
The fuse protecting the power supply’s secondary circuits prevents physical defects of the power supply and
the components connected to it�
OTP (Temperature safeguard)
In the case of excessive heat build-up in the power supply, the power supply immediately and automatically
switches o. You cannot switch it back on until it has cooled down. Please ensure that the PC has sucient
cooling�
OPP (overload protection)
This safeguard is triggered if the total output of the power supply exceeds the specied maximum load. This
can happen if the output of power supply is insucient for the system (incorrectly dimensioned).
6. TROUBLESHOOTING
Please note: If you have an ATX system, the power supply is enabled by the motherboard in order to boot the
PC. For this reason, please refer to the motherboard or case manual to check whether the on/o switch is
connected correctly�
Caution: There is a risk of fatal injury when working on power sources. If you notice traces of smoke, damaged