SeaSonic Electronics GX-1000W 80-PLUS Gold PCIE5 Modular Power Supply - Manual (Page 4)

3. Position your PSU
3.3. Top of the case
Mount the power supply with the
ventilation top cover facing UPWARD
only if there is enough space (at least
5 cm / 2 inches) available between the
PSU ventilation top cover and the metal
plate of the case, and only if the case
has a ventilation panel on top.
4. Install your Seasonic PSU
4.1. Secure all 4 mounting screws.
4.2. Make sure the PSU power switch is
in the “O” (OFF) position.
4.3. Select the fan control type if your
PSU has this option.
Note: First power OFF the PSU before changing
the fan control to take effect.
Hybrid
Mode
Normal
Mode