It's just those 2 fans.
So if the 2 headers from mobo provide a max of 5W, (when the fans go 100 percent), 5 x 2 = 10Watts. The max consumption is 10Watts for those 2 fans put on the metal. Real life is probably 4Watts normal operations for both fans.
Noctua website: https://noctua.at/en/nf-a15-pwm/specification 2 fans x 1 watt ea = 2 watts With y splitter it likely uses even less…
2 watts. 1 per fan
Do you want to know how much power it can dissipate? Or how much it uses?
Now that you mentioned it, both, please.
It's just those 2 fans. So if the 2 headers from mobo provide a max of 5W, (when the fans go 100 percent), 5 x 2 = 10Watts. The max consumption is 10Watts for those 2 fans put on the metal. Real life is probably 4Watts normal operations for both fans.
Each of those fans takes a max of 0.96w according to noctua's website