The king of fans has released its own fan hub that can control eight fans via one motherboard header and includes overcurrent protection for peace of mind.
Noctua NA-FH1, 8 Channel Fan Hub for up to Eight 12V or 5V Based 4-pin PWM or 3-pin Fans (Black) : Electronics
Noctua NA-FH1 Fan Hub 8-Port PWM Fan Hub
Noctua NA-FH1 PWM fan hub
Product Guide: Everything you need to know about the NA-FH1 : Noctua Knowledge Centre
Noctua NA-FH1, 8 Channel Fan Hub for up to Eight 12V or 5V Based 4-pin PWM or 3-pin Fans (Black) : Electronics
Noctua NA-FH1 Fan Hub 8-Port PWM Fan Hub
Noctua NA-FH1 PWM fan hub
Noctua NA-FH1, 8 Channel Fan Hub for up to Eight 12V or 5V Based 4-pin PWM or 3-pin Fans (Black) : Electronics
Noctua NA-FH1 Fan Hub Review - Noctua NA-FH1 Fan Hub Review
Noctua Presents NA-FH1 Eight Channel PWM Fan Hub - Funky Kit
NA-VC1
Noctua NA-FH1 8 Channel Fan Hub for up to Eight 12V/5V Based 4-pin PWM or 3-pin Fans magnetic fixed device/Automatic reset fuse - AliExpress
NA-FH1