The front fan of the NH-D15 and NH-D15 G2 coolers overhangs the RAM slots on many motherboards.

If your RAM modules are no taller than 32 mm:

Out of the box, the NH-D15 and NH-D15 G2 coolers allow for RAM modules with a height of up to 32 mm. In this default setup, the cooler height is 168 mm.

Using the NH-D15 and NH-D15 G2 coolers with RAM modules taller than 32 mm:

• Option 1 - Moving the front fan up by a few millimetres 
  This will increase the total cooler height! Use the calculator below to find out the exact height.
• Option 2 - Installing a 120 mm fan instead of the included fan
  This makes room for up to 52 mm tall RAM modules, with a total cooler height of 168 mm.
  When using taller RAM modules, use the calculator below to find out the resulting cooler height.
  As a 120 mm fan, we would recommend the NF-A12x25 PWM or the NF-F12 PWM.
• Option 3 - Removing the fan above the RAM modules
  This way, only the heatsink will overhang the RAM modules. The total cooler height in this setup is: 160 mm (NH-D15) / 168 mm (NH-D15 G2)
  In this setup, there is space below the heatsink for RAM modules with a height of up to: 66 mm (NH-D15) / 54 mm (NH-D15 G2)
  Using the NH-D15 or NH-D15 G2 with only fan will, however, lead to a slightly decreased cooling performance.

An increase in the total cooler height matters, as it could potentially lead to compatibility issues with your case, i.e. the case might be too narrow so that the side panel can no longer be closed.

How tall is the NH-D15 or NH-D15 G2 when using it with RAM modules taller than 32 mm?

Please look up the exact height of your RAM modules. You can do so by entering the model into our Noctua Compatibility Centre RAM section.

Next, enter the height into the calculator and click on “Calculate height”.