Airflow on Intel B350M Pro4

Greetings, I am currently contemplating the purchase of this specific motherboard, paired with a Corsair Vengeance chassis which comes equipped with one 120mm intake fan and one 120mm exhaust fan. In addition to those, I have decided to pick up two 140mm fans to bolster the setup. My primary concern, however, is that the motherboard seems somewhat lacking in terms of fan headers—which I suppose is its only true drawback given the price point—as it only offers one 3-pin header and one 4-pin header for case fans. Given this limitation, I am trying to figure out how I might connect all four fans while still maintaining full control over their speeds. Would it be viable to purchase two separate splitters, such that one expands the single 4-pin header into two 4-pin connections, and the other converts the 3-pin header into two 4-pin connections? For instance, if I were to buy two 140mm fans with 4-pin connectors, assuming the pre-installed fans in the case are the older 3-pin variety, would this configuration actually work, or am I perhaps fundamentally misunderstanding the mechanics at play here? Furthermore, I am somewhat uncertain whether this motherboard supports speed regulation for both 3-pin and 4-pin fans, or if it is limited to just one type. I have attempted to research this, but I haven't quite managed to reach a definitive conclusion. I have also read mentions of dedicated fan hubs or controllers that mount directly to the motherboard to provide multiple outputs; would such a solution be worth considering? How would those of you with more experience navigate this particular dilemma of a novice?

I'm looking at the Best Buy manual, but they kept it pretty vague. From what I can gather, you've got two fan headers: one 3-pin and one 4-pin. It looks like that 3-pin one doesn't offer any real control, whereas the 4-pin one lets you tweak things using either PWM or voltage.
3-pin fans can be controlled via voltage, while 4-pin ones use PWM, which is arguably a bit more precise and better overall.

That method you mentioned—using a 1x4-pin splitter to get 2x4-pin—works fine. You could also turn a 1x3-pin into a 2x4-pin setup, but those fans would just run at full blast since that connector doesn't have any way to regulate them...

If I were you, I'd just grab a case first, see what kind of fans it actually comes with, and then plug them into the motherboard's 4-pin header using a Y-splitter to check the temps. There’s really no point in cramming in a ton of fans if you don't need to; sometimes you just end up creating a mess instead of actually helping anything.

fadedorca66 said:I'm looking at the Best Buy manual, but they kept it pretty vague. From what I can gather, you've got two fan headers: one 3-pin and one 4-pin. It looks like that 3-pin one doesn't offer any real control, whereas the 4-pin one lets you tweak things using either PWM or voltage.
3-pin fans can be controlled via voltage, while 4-pin ones use PWM, which is arguably a bit more precise and better overall.

That method you mentioned—using a 1x4-pin splitter to get 2x4-pin—works fine. You could also turn a 1x3-pin into a 2x4-pin setup, but those fans would just run at full blast since that connector doesn't have any way to regulate them...

If I were you, I'd just grab a case first, see what kind of fans it actually comes with, and then plug them into the motherboard's 4-pin header using a Y-splitter to check the temps. There’s really no point in cramming in a ton of fans if you don't need to; sometimes you just end up creating a mess instead of actually helping anything.

👍👍

Exactly. An Intel Core paired with even a decent GPU isn't going to pull massive amounts of power.

Besides, you can always grab a fan controller. You can mount one behind the PCIe slots, in a drive bay, or wherever there's space.

But that’s only if you actually care about controlling speeds. If you don't give a damn about adjusting RPMs, just plug them straight into the PSU using a cheap Molex adapter.$3.25.

Hello everyone, I think I shall refrain from adding any unnecessary complexity to the situation. It is my hope that having those two pre-installed fans will prove sufficient for my needs. After all, I have no intention of attempting any overclocking unless circumstances absolutely demand it, and since the case features a dedicated tunnel for the power supply and drive bay, that should provide some helpful airflow to manage temperatures.

You'll have two fans in the case, which is plenty. Honestly, even if you didn't have a single one, it would still be enough, if you catch my drift.