Power consumption for different FIM-7941F FortiGate 7121F configurations

The tables in this section provide information about how to calculate maximum power consumption for a FortiGate 7121F system with two FIM-7941Fs and with four, six, or ten FPM-7620Fs.

These example calculations should be used as guidelines only. In practice, actual power usage will most likely be higher and the efficiency of PSUs varies for different levels of power consumption and loading. The maximum power consumption of a fully loaded FortiGate 7121F under ideal conditions has been measured as 9754W and the average power consumption is 8296W.

Power consumption calculation with four FPM-7620Fs

The following table shows that a FortiGate 7121F with two FIM-7941Fs and four FPM-7620Fs would require a power allocation of 5524W.

• The capacity of each generation 1 PSU is 2000W. The system would require three PSUs (2000 x 3 = 6000W). You could add up to five extra PSUs for redundancy.

• The capacity of each generation 2 PSU is 2500W. The system would require three PSUs (2500 x 3 = 7500W). You could add up to five extra PSUs for redundancy.

Module	Max power consumption (W)	Number of modules	Total max power (W)
FIM-7941F	630	2	1260
FPM-7620F	716	4	2864
Chassis (fans, SMMs etc)	1400	N/A	1400
		Totals	5524

Power consumption calculation with six FPM-7620Fs

The following table shows that a FortiGate 7121F with two FIM-7941Fs and six FPM-7620Fs would require a power allocation of 6956W.

• The capacity of each generation 1 PSU is 2000W. The system would require four PSUs (2000 x 4 = 8000W). You could add up to four extra PSUs for redundancy.

• The capacity of each generation 2 PSU is 2500W. The system would require three PSUs (2500 x 3 = 7500W). You could add up to five extra PSUs for redundancy.

Module	Max power consumption (W)	Number of modules	Total max power (W)
FIM-7941F	630	2	1260
FPM-7620F	716	6	4296
Chassis (fans, SMMs etc)	1400	N/A	1400
		Totals	6956

Power consumption calculation with ten FPM-7620Fs

The following table shows that a FortiGate 7121F with two FIM-7941Fs and ten FPM-7620Fs would require a power allocation of 9820W.

• The capacity of each generation 1 PSU is 2000W. The system would require five PSUs (2000 x 5 = 10000W). You could add up to three extra PSUs for redundancy.

• The capacity of each generation 2 PSU is 2500W. The system would require four PSUs (2500 x 4 = 10000W). You could add up to four extra PSUs for redundancy.

Module	Max power consumption (W)	Number of modules	Total max power (W)
FIM-7941F	630	2	1260
FPM-7620F	716	10	7160
Chassis (fans, SMMs etc)	1400	N/A	1400
		Totals	9820