Thanks for sharing your setup and some options bro. Im using an ITX gigabyte H87N WIFI rev 2. Ang meron lang sya is cpu fan + 1 system fan header. Total of 2. stock cooler pa lang ako so far and may magagandang offer sa akin ng CLC. either antec kuhler or corsair pero hindi pa ako decided. preference ko mag clc instead na air cooler to avoid weight and mas may clearance ang clc for me. using bitenix itx case.
Please correct me if im wrong I read before that mas magandang i isolate yung fans sa separate power source, meaning wag nang gamitin yung sa motherboard. This is to avoid stressing out the motherboard channeling too much power.
one option daw is to do an all fans -> fan controller -> PSU
another is to do an all fans -> motherboard fan headers (no more additional connection to PSU since yung board may power na). Then set some fans to full speed in BIOS (like you said), my stock cooler is running at max fan speed right now via bios sa board ko
Since limited yung fan headers sa mobo mo, kung ako ang magse-setup niyan, here's what I'd do: 2 x fans on the rad connected to the CPU fan header via a fan splitter, then the pump connected to the remaining fan header.
Then yung additional fans (intake/s or exhaust/s) will be connected to the PSU via molex to fan cables OR connected to a fan controller. Mas prefer ko kasi na sa mobo nakakabit yung pump/rad fans, but that's just my preference. :)
Besides, the mobo fan headers can provide more power than what the pump and the rad fans require. Most fan headers can provide up to 1A of power, yung iba 2A pa. The Thermaltake Water 3.0 Pro, for example, only requires .175A to power the pump. .3A naman to power each fan (so .6A lang for 2 fans via a fan splitter).