* If the connectors on the motherboard is facing forward, then the thickness supported for the fan is 272mm, minus the length of the SATA cable connector and minus the size of the motherboard. i.e. if the direction of the connectors on the motherboard is upward, then the front fan supports fans with thickness of up to 25mm. ** Supports motherboard size of 248mm minus the fan’s total thickness *** Corresponds to motherboard’s connector design, which allows a total height of 23mm, while leaving the 4th PCI slot unoccupied.