You may also be hearing a pump noise(may be ticking that could sound like a hard drive always seeking). Please ensure your pump is running at full speed since some are lower at slow speeds, while others are more quiet. Either way they are made to run full speed and slowing it can cause other issues such as a failure to run(stall).
They have had more than one H60 over the years so if it connects to a fan header, make sure fan control is off or it is a PWM header(since it will not control the pump speed.). The CPU_OPT on some boards is good for this.
In general the pump noise is not an issue, but monitor the speed to ensure it does not fail in the future(most motherboard bios setups will give a warning if a fan has failed. The pump...