2 upvotes, 1 direct replies (showing 1)
View submission: Simple Questions - November 30, 2020
I'm a bit confused about the whole case fan situation. I purchased a Gigabyte B450M DS3H Mobo before realizing that it only has 1 fan header for case fan. The case I got has 1 3-pin fan included in the back. I wanted to add another, so I got a noctua redux 4-pin PWM fan (before I was aware of the single header).
https://www.amazon.ca/dp/B07MTFF1M7/ref=cm_sw_r_fm_apa_fabc_2NtXFbZMNMZXA
I found splitters like this, which say both 3 pin and 4pin are supported. Just wondering if I can connect both, and would both of them have their speed controlled. And if so, is there an order I should connect them in? I.e. first one being the 3-pin, then second one being 4-pin? Any changes to the Mobo settings?
Comment by OolonCaluphid at 30/11/2020 at 19:00 UTC
1 upvotes, 1 direct replies
You can't mix fan types on the same header and have proper control. 3pin control by straight voltage variation. 4pin control by pulse width modulation.
Get a matching 3 or 4pin fam, then you can run them both off that one header.
That's the main reason the ds3h sucks, and I'd never recommend it for anything more than an office build.