1 or 2 fans on cpu cooler?

[dmdport]

I just got the Cooler Master MB311L and arctic P14 fans and loaded up my case with them. This leaves me with an extra RGB included case fan that I dont have anywhere to put. I have a Cryorig h7 and want to possibly add the extra case fan to the cooler but I believe it is a bit slower than the fan currently on the CPU cooler.

Will this hinder performance in anyway, especially if I put the slower (RGB) fan on the front of the cooler pushing and the faster one pulling OR will it possibly help the performance?

[DieegoPeri]

Won't really do much, if else will slow down the airflow if it's actually slower

Even if the airflow increased, that cooler is pretty much doing the best it can do

[dmdport]

Originally posted by DieegoPeri:

Won't really do much, if else will slow down the airflow if it's actually slower

Even if the airflow increased, that cooler is pretty much doing the best it can do

Gotcha, the reason I'd be doing it is strictly for the extra RGB but if its going to hurt temps then Ill just skip on it.

[Los.Injurus.Bob.Blunderton]

Look up the stats of the included fan with your CPU cooler and the extra fan you have laying about. Consider how quiet the fan is at medium and full load, that is just as important.
Put whatever is better on the CPU cooler. You CAN put both on, but at most it's a 2~3C difference really. Unless your CPU is right up against the limit of what the cooler can handle, you shouldn't see too much difference. Even if the other fan 'slowed down' air somehow (it would just cause excess to go over the heatsink fins in a greater area and out the sides a bit which does not hurt, or have more air sucked across the fins in the opposite case), it would off-set any issue it caused and not be a detriment. For motherboard health, consider trying to keep as much air moving over the VRM section of the motherboard so it lives a long healthy life (above and 'behind' the CPU on the motherboard when looking from the front, it would be top and left when looking from the left side of the PC inward with side-panel removed.) Some tower coolers do this better than others, but this is also why down-draft coolers are as popular with OEMs as they are (downdraft coolers = ones that suck air in and blow it out the sides of the heatsink like what comes with AMD and intel chips stock). Most decent motherboards will give a reading for VRM temps - this can throttle the CPU and potentially shorten the life of the motherboard if ignored especially on some more poorly made motherboards (such as MSI's MPG X570 model with 100C load VRM temps while competitors have 65~85C temps under load).
For those not sure when buying fans, Noctua, Fractal, and models with 'SilentWings' in the names are all good names. I forget who makes silent wings fans or if that's the brand name, it's eluding me at the moment.

Hope this wasn't confusing. If you want the second fan on there, know it doesn't do alot a is more for marketing and looks. But if it means something to you and you have the means to do so, go ahead and put it on as you generally won't hurt anything by doing so.
*Years ago, Cooler Master and some other cheap brands used to ship SLEEVE bearing fans with their coolers. Never mount a sleeve bearing fan from anyone in the horizontal (such as top or bottom of case) position as it won't be able to lube the spindle correctly due to design, and will wear out and rattle or overheat & seize up. Non-sleeve bearing fans overcome this issue with better designs, thankfully. It should say on the product page, product carton, and/or fan motor itself what type of bearing it is.

[Magma Dragoon]

Arctic P14 are 140mm static pressure PWM controlled fans, these are for radiators. However, the H7 fits 120mm fans, so you cannot. For case fans you want F14.

[dmdport]

Originally posted by Magma Dragoon:

Arctic P14 are 140mm static pressure PWM controlled fans, these are for radiators. However, the H7 fits 120mm fans, so you cannot. For case fans you want F14.

I understand that part of it, I'm asking if it would impact performance in anyway if I put my included ARGB case fan on the cpu just to add more lighting. And I got the P14 over the F14 because air is being pulled and pushed through a filter with this case so it probably makes little difference i'd say.

[dmdport]

Originally posted by Beamng.mapper.Bob.Blunderton:

Look up the stats of the included fan with your CPU cooler and the extra fan you have laying about. Consider how quiet the fan is at medium and full load, that is just as important.
Put whatever is better on the CPU cooler. You CAN put both on, but at most it's a 2~3C difference really. Unless your CPU is right up against the limit of what the cooler can handle, you shouldn't see too much difference. Even if the other fan 'slowed down' air somehow (it would just cause excess to go over the heatsink fins in a greater area and out the sides a bit which does not hurt, or have more air sucked across the fins in the opposite case), it would off-set any issue it caused and not be a detriment. For motherboard health, consider trying to keep as much air moving over the VRM section of the motherboard so it lives a long healthy life (above and 'behind' the CPU on the motherboard when looking from the front, it would be top and left when looking from the left side of the PC inward with side-panel removed.) Some tower coolers do this better than others, but this is also why down-draft coolers are as popular with OEMs as they are (downdraft coolers = ones that suck air in and blow it out the sides of the heatsink like what comes with AMD and intel chips stock). Most decent motherboards will give a reading for VRM temps - this can throttle the CPU and potentially shorten the life of the motherboard if ignored especially on some more poorly made motherboards (such as MSI's MPG X570 model with 100C load VRM temps while competitors have 65~85C temps under load).
For those not sure when buying fans, Noctua, Fractal, and models with 'SilentWings' in the names are all good names. I forget who makes silent wings fans or if that's the brand name, it's eluding me at the moment.

Hope this wasn't confusing. If you want the second fan on there, know it doesn't do alot a is more for marketing and looks. But if it means something to you and you have the means to do so, go ahead and put it on as you generally won't hurt anything by doing so.
*Years ago, Cooler Master and some other cheap brands used to ship SLEEVE bearing fans with their coolers. Never mount a sleeve bearing fan from anyone in the horizontal (such as top or bottom of case) position as it won't be able to lube the spindle correctly due to design, and will wear out and rattle or overheat & seize up. Non-sleeve bearing fans overcome this issue with better designs, thankfully. It should say on the product page, product carton, and/or fan motor itself what type of bearing it is.

Ok cool. Like I said I'd only be adding on the second fan for the sake of showing off a bit more rgb. I just wanted to make sure that there wasn't some performance impact I wasn't considering.

[Magma Dragoon]

I've never seen a dual fan cooler where the fans didn't counter rotate, so maybe bad thing will happen? Probably not. Just benchmark before and after, something that can run for like 20 minutes so you can be really certain you are at thermal equilibrium, and monitor the temperature. You'll need a splitter or a hub or a CPU fan slave header on the motherboard.

[[☥] - CJ -]

I have my fan in a pull instead of a push
This is because when it comes to dust n what not it goes through the fins instead of being stuck near the backplate of the fan and the fins of the cooler as normally happens.

[dmdport]

Originally posted by Magma Dragoon:

I've never seen a dual fan cooler where the fans didn't counter rotate, so maybe bad thing will happen? Probably not. Just benchmark before and after, something that can run for like 20 minutes so you can be really certain you are at thermal equilibrium, and monitor the temperature. You'll need a splitter or a hub or a CPU fan slave header on the motherboard.

Yep, im good on headers. My motherboard has 2 for cpu fans.

[King Oshawott]

I have 2, but i dont really know if it does anything strictly more efficiently? i mean, its twice as fast at cooling, but im not running minecraft with 3 shader mods.