Question How many Noctua IndustrialPPC fans are safe on one molex connector?

[Jyle]

PSU: CORSAIR SF Series 80 PLUS Platinum SFX Power Supply

The chassis fans in my CM HAF 912 are as follows: 3x NF-F12 industrialPPC-2000 PWM; 3x NF-F12 industrialPPC-3000 PWM; and 1x NF-A14 industrialPPC-2000 PWM.

Currently, I have 6 of these fans connected to one molex connector, and 1 is connected to another molex connector on the same cable.

Is this safe or going to lead to a problem?

 

[dwd999]

More of that pesky math stuff: so 3 F12-2000 fans use a total 3.6 watts of power; 3 NF-12 3000 use a total 10.8 watts; and an A14-2000 uses 2.16 watts. Total 16.56 watts aka 1.38 amps at 12 volts. But Corsair doesn't specify the amps provided by each 12 volt molex output, just the total, which is 62.5 amps at 12 volts for their smallest SF psu. You will have to guess for yourself if that's OK.

 

[Jyle]

More of that pesky math stuff: so 3 F12-2000 fans use a total 3.6 watts of power; 3 NF-12 3000 use a total 10.8 watts; and an A14-2000 uses 2.16 watts. Total 16.56 watts aka 1.38 amps at 12 volts. But Corsair doesn't specify the amps provided by each 12 volt molex output, just the total, which is 62.5 amps at 12 volts for their smallest SF psu. You will have to guess for yourself if that's OK.

Alright, and since there are four connectors on the cable, each one would be able to handle 15.625 amps, yes? That would be much more than the 1.38 amps of all the fans.

 

[CountMike]

Alright, and since there are four connectors on the cable, each one would be able to handle 15.625 amps, yes? That would be much more than the 1.38 amps of all the fans.

No, total cable power coming from PSU. depending on wire gauge but each Molex connector is rated for 156W-

 

[Paperdoc]

All above looks right to me except where the limits are. The real limiting factor here is that the contacts in ONE 4-pin Molex connector can supply up to 4.5 A. So from one Molex output connector on the cables from the PSU, the 12 VDC supply wires (only those are used for a fan) can supply up to 4.5 A or 54 W. It is quite right to suggest that using MORE than one Molex connector from the SAME set of wires from the PSU would allow more power in total, but that limit will be imposed by the PSU itself. Surely the PSU CAN supply MORE that 54 W at 12 VDC. But for OP's query, with a potential of max 16.6 W as dwd999 says, there is NO problem doing as OP asks.

 

[Jyle]

All above looks right to me except where the limits are. The real limiting factor here is that the contacts in ONE 4-pin Molex connector can supply up to 4.5 A. So from one Molex output connector on the cables from the PSU, the 12 VDC supply wires (only those are used for a fan) can supply up to 4.5 A or 54 W. It is quite right to suggest that using MORE than one Molex connector from the SAME set of wires from the PSU would allow more power in total, but that limit will be imposed by the PSU itself. Surely the PSU CAN supply MORE that 54 W at 12 VDC. But for OP's query, with a potential of max 16.6 W as dwd999 says, there is NO problem doing as OP asks.

Thank you, Paperdoc.

 

[SkyNetRising]

The chassis fans in my CM HAF 912 are as follows:

3x NF-F12 industrialPPC-2000 PWM;​

3x NF-F12 industrialPPC-3000 PWM;​

and 1x NF-A14 industrialPPC-2000 PWM.​

I have 6 of these fans connected to one molex connector, and 1 is connected to another molex connector on the same cable.

3000rpm fans on full blast?
Your pc probably sounds like a jet plane. LOL.

What type of hardware requires such fan setup?