#IT – HP Z400 Xeon W3550 lower noise

3.06GHz, 3.33GHz turbo but the fan(s) kick in and sometimes you just want it to remain quiet but still run as fast as it can before the fans need to kick in.

Currently I have it set within Windows 7 power settings to give a max speed of 2.5GHz. This works quiet for most tasks but a few things cause the fans to kick in such as BI games (ArmA 2, ArmA 3, Day Z), also Garry’s Incident. Some other tasks can also cause noise including badly demanding websites such as Twitch. This is also useful in Summer etc when it is hot to allow downclocking to keep quiet AND cool.

 

To get 2.5GHz,
in the Control Panel,
Power Options,
Change Plan Settings,
Change advanced power settings,
Change settings that are currently unavailable,
Processor power management,

Minimum processor state 85%,
Maximum processor state 85%
This will keep the CPU running at most 2.5GHz and it will idle at 2.1GHz

Minimum processor state 1%,
Maximum processor state 85%
This will keep the CPU running at most 2.5GHz and it will idle at the lowest it can do which is 1.6GHz

Minimum processor state 81%,
Maximum processor state 81%
This will keep the CPU running at most 2.4GHz and it will idle at 1.9GHz

Minimum processor state 1%,
Minimum processor state 1%
This will keep the CPU running at most 1.6GHz and it will idle at 1.6GHz

The last one above is a significant downclock and is the coolest and quietest you can get the machine.

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