So I have built a new system which has two fans but only 1 system fan port on the mobo. I decided to use a PWM fan y-splitter. After I booted up my pc only 1 fan is spinning.
I had a few tests, and lets say I have fan 1 and fan 2, and the splitter has head 1 and head 2.
Test 1: using splitter, head 1 on fan 1, head 2 on fan 2 ---> only fan 2 is spinning.
Test 2: using splitter. head 1 on fan 2, head 2 on fan 1 ---> only fan 2 is spinning still.
After 1 and 2 I swapped to another splitter but it gives the same result, which means the splitter has no issue.
Test 3: no splitter, connect fan 1 to mobo ---> fan 1 spinning
Test 4: no splitter, connect fan 2 to mobo ---> fan 2 spinning
Test 3 and 4 shows that both of the fans has no issue.
Where is the problem and how do I fix this? Thank you!
Ed: both of the fans are the noctua nf-a14 and the y-splitter is from noctua as well.