Articles: Cooling

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Testbed and Methods

Our testbed was assembled in a closed case and included the following components:

  • Intel Prescott 3.0GHz CPU overclocked to 4.0GHz
  • ASUS P5LD2 Deluxe mainboard
  • 2 x Corsair XMS2-4300 512MB memory @ 667 MHz
  • NVIDIA GeForce 6800 GT PCIE graphics card
  • Windows XP Pro SP2 OS

The room temperature during our tests was around 24-25o C.

During our first testing round the Zalman Reserator 1 Plus was set at about 50cm to the right of the system case away from all air flows. In this case the Reserator works as a classical passive heatsink, so that its heat dissipation efficiency is strictly determined by the difference of the environment temperature and water temperature inside the Reserator.

However, there is a great way of increasing the efficiency of the Reserator cooling system without adding any additional noisy components to the system. All you need to do is place the Reserator behind the system case, right at the back panel, where the PSU and other fans (if there are any) oust the air from the system case. The thing is that the temperature of the airflow directed at the Reserator will be much lower than the temperature of the water inside it, because all the heat from the CPU and graphics processor are already taken by the water units, and the air inside the system case heats up just a tiny bit by the remaining system components.

So, for our second testing round we put the Reserator unit behind the system case at a 20cm distance from the panel, so that it could be in the way of the outgoing air flow generated by the 80mm fan of the PSU and a quiet 120mm rear case panel fan rotating at only 1,400-1,450rpm.

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