Question case fan curve/fan recommendation

P0tluck94

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Nov 22, 2021
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Hello friends been a while ,i have a question about bios fan curves and fans/case in general , so the issue is my gpu is always running warmer than i like, i know 75 isnt hot im more concerned that MSI after burner has the fan speeds at 82% , i tried my own fan curve which ran the fans at 75% in afterburner for the gpu and it actually got warmer (77) like 75% was not enmough speeds to kep the card cooler
im horrible at fan curves but im trying to learn and if i can fine tune the case airflow the gpu should run cooler as well unless the case/fans are just terrible themselves, so i'll give you my specs again.

r5 3600
msi b550m pro vdh wifi motherboard
asus ko 8gb 3060ti
seasonic 850 focus gold
32 gigs trident 3600 cl 16
case is a coolermaster master box mb311L
my case fans are coolermaster argb 4pin for top (2 intake) rear(1 exhaust)
the fronts are 3 pin that came with the case (2 intake) so i have 4 intake 1 exhaust thats not including 2 fans on gpu, 1 fan on cpu, 1 psu

so here are the curves i have in the bios and the sensors for them
cpu fan (stock wraithn cooler) 0-55 degrees its at 50%, 65 degrees is 75%, 75 degrees is 100% (1 fan) SENSOR = cpu core
pump (4 pin top intake) 0-60 at 50% , 65 degrees is 75%, 75 degrees is 100% (2 fans) SENSOR = system
front (3 pin intake) 0-60 at 6.12V , 65 degrees is 9.12V. 75 degreesis 12V (2 fans) SENSOR = system
rear (4 pin exhaust) 0-55 drees is 50% , 65 degrees is 75% , 75 degrees is 100% (1 fan) SENSOR = CPU (so when cpu warms up it exhausts at the same rate as cpu fan cools as its directly inline with cpu)

i changed all these today as i didnt realize when i updated the bios i had all the fans on cpu core and the constant fluctuation with cpu was driving me nuts so i put them all on system besides exhaust, I dont know if system sensor is okay to use, i dont know if my settings are good , i dont even know if the fans are optiomal /good they are cheap, cpu stays cool at 60-67 , i know the case isnt the best either but im just trying to ball on a budget until after i get my surgery then i'll be going to a 5800x3d, 3080/3090 i dont want to go am5 or 40's series but that discussion is for later.
to summarize im just trying to get the best cooling/temps i can for right now, looking to improve fan curves to provide optimal flow but i dont know how to even tell if the flow is good , recommendation on better case fans if i need to upgrade them and a case (this can be put off as i stated i will be upgrading after surgery which is new case/mobo/cpu etc etc ) but a recommendation for later would be nice i weas looking att he phantex p400. i cant upload pics or i'd take pics of the fan curves in the bios. i am going with a noctua U12 for this cpu when i build the upgrade (well have it built)

thanks
 

Paperdoc

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First, it IS best to have all your case ventilation fans connected to mobo SYS_FAN headers AND to ensure (IF your mobo has any option) that those headers are using the general mobo System Temperature sensor, not the one inside the CPU chip.

Next, you may not achieve what you wish this way. In general the cooling of your GPU chip is governed entirely by the video card itself and it own temperture control system. This is NOT managed by anything on the mobo. So the software utility that came with your video card - the same tool you use to observe the GPU temperature - MAY also show you the "fan curve" it is using for this job. It MAY allow you to customize this curve for a lower temperature target. But unless that system already is running its fans full speed so that it cannot cool any better, altering the temperature of the air inside your case will NOT change the temperture of your GPU because its cooling system IS meeting its GPU target now.
 

P0tluck94

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Nov 22, 2021
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First, it IS best to have all your case ventilation fans connected to mobo SYS_FAN headers AND to ensure (IF your mobo has any option) that those headers are using the general mobo System Temperature sensor, not the one inside the CPU chip.

Next, you may not achieve what you wish this way. In general the cooling of your GPU chip is governed entirely by the video card itself and it own temperture control system. This is NOT managed by anything on the mobo. So the software utility that came with your video card - the same tool you use to observe the GPU temperature - MAY also show you the "fan curve" it is using for this job. It MAY allow you to customize this curve for a lower temperature target. But unless that system already is running its fans full speed so that it cannot cool any better, altering the temperature of the air inside your case will NOT change the temperture of your GPU because its cooling system IS meeting its GPU target now.
okay so getting better airflow in the case will not help the gpu temps is that what you're saying? bare with me im a stroke survivor so my brain takes a minute to comprehend lol, i use msi after burner for the gpu as thats what ive always used on every gpu ive had , is there a better one? or one that i should be using besides msi? i use msi to also use rivatuner so i can monitor frames/temps/utilizations etc , like i said i know 75 degrees isnt hot but when i was using my ac the gpu never got over 72 degrees so i thought the air temp inside the case being cooler was helping keep the gpu run cooler, so i thought adjusting air flow in the case even though the ambient temp of the room is warmer as it being winter with the heaters on than with ac on and ambient temp being not only colder but thinner as theres no humidity would help. the gpu stay cooler.
 

Zerk2012

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after burner has the fan speeds at 82% , i tried my own fan curve which ran the fans at 75% in afterburner for the gpu and it actually got warmer (77)
So you lowered the fan speed and the card ran hotter, yes that is what happens.

I've never adjusted case fan speeds I just let them do what they do in any build ever.

I always have set a custom curve for the video card, you went the wrong way.
 

P0tluck94

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Nov 22, 2021
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So you lowered the fan speed and the card ran hotter, yes that is what happens.

I've never adjusted case fan speeds I just let them do what they do in any build ever.

I always have set a custom curve for the video card, you went the wrong way.
I just thought that if I decreased the fan speed at a lower temp target the card would not reach a higher temp as the fan speed would keep it cooler, if that makes any sense,

Like so with the premade curve in msi at 73° the fans are 82% I thought putting the fan speed at 75% @ 70 degrees would prevent it from reaching 74-75 degrees
 

Zerk2012

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I just thought that if I decreased the fan speed at a lower temp target the card would not reach a higher temp as the fan speed would keep it cooler, if that makes any sense,

Like so with the premade curve in msi at 73° the fans are 82% I thought putting the fan speed at 75% @ 70 degrees would prevent it from reaching 74-75 degrees
Not how it works.
90% @ 70C would of worked.
 
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P0tluck94

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Nov 22, 2021
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Doesn’t matter if you just push air in the case and it doesn’t exhaust
thatas what im here for, do i flip the rear around for intake and use top 2 for exhaust so i'll have 3 intake 2 exhaust , do i speed up exhaust fan so instead of 50% run it at 60% to it exhausts more , etc ? im here to learn cant do so with blanket statements
 

Phaaze88

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Hi, @P0tluck94
Looking at your specs:
1)2 top intakes don't help, when the gpu dumps its waste heat inside your PC. What doesn't get absorbed by the glass panel + motherboard and pulled out the rear will loop back into the gpu cooler.
2)This might be the one that's hurting it the most... space.
That gpu is practically 3-slot. Not much space in the MB311L for thicker gpus; the impermeable psu shroud is 1 slot away. Actually, it's less than that, since the current motherboard is one of those models with a M.2 slot above the primary x16.


In short:
1)No to top intake.
2)Air intake is weak - not due to the mesh front, but because of the gpu cooler's proximity to the solid psu shroud.
 

P0tluck94

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Nov 22, 2021
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Hi, @P0tluck94
Looking at your specs:
1)2 top intakes don't help, when the gpu dumps its waste heat inside your PC. What doesn't get absorbed by the glass panel + motherboard and pulled out the rear will loop back into the gpu cooler.
2)This might be the one that's hurting it the most... space.
That gpu is practically 3-slot. Not much space in the MB311L for thicker gpus; the impermeable psu shroud is 1 slot away. Actually, it's less than that, since the current motherboard is one of those models with a M.2 slot above the primary x16.


In short:
1)No to top intake.
2)Air intake is weak - not due to the mesh front, but because of the gpu cooler's proximity to the solid psu shroud.
What should I do with the top 2 fans? Exhaust? I know the case isn't very good it's mini atx, so what am I looking at? Better case, reverse top fans and rear fan? Like turn the one exhaust fan around to intake flip 2 top intakes around to exhaust?
 
What should I do with the top 2 fans? Exhaust? I know the case isn't very good it's mini atx, so what am I looking at? Better case, reverse top fans and rear fan? Like turn the one exhaust fan around to intake flip 2 top intakes around to exhaust?
I’d just disconnect them and check temps. You may want to have 1 exhaust up top but honestly 2 intake on front and 1 exhaust in rear should be great
 

Phaaze88

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What should I do with the top 2 fans? Exhaust? I know the case isn't very good it's mini atx, so what am I looking at? Better case, reverse top fans and rear fan? Like turn the one exhaust fan around to intake flip 2 top intakes around to exhaust?
Yes, exhaust.

I didn't say the case wasn't very good - size doesn't determine if a case is good/bad either.
Although, what you want to achieve may not be possible without mangling the case, like removing that psu shroud...
 

P0tluck94

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Nov 22, 2021
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Yes, exhaust.

I didn't say the case wasn't very good - size doesn't determine if a case is good/bad either.
Although, what you want to achieve may not be possible without mangling the case, like removing that psu shroud...
You said no top Intakes, I put those fans up there because it ran hotter, it did cool it down a bit, but why did you say no top intake? do I flip the one rear to intake and the 2 tops too exhaust so I have 3 intake and 2 exhaust, or are you just saying to leave it be because the gpu really doesn't have breathing room and no matter the fan config not much what I can do, I'm Building a new pc after my surgery but still using the 3060ti in the new build unless I can get a deal on a, 3080ti /3090, which in this case my 1660 super will go back in which is way thinner
 

Phaaze88

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Take a picture of the inside of the PC - with the side panel removed, and post it here so we can all see the fan faces, coolers, etc.

You said no top Intakes, I put those fans up there because it ran hotter, it did cool it down a bit, but why did you say no top intake?
I told you why: because open air models like that one dump all their waste heat inside the PC. Top exhaust should help get that out faster compared to intake.
That heated air will increase case ambient, which in turn, increases the operating temperature of everything else.
The heated air disperses into the room, increasing its ambient, and eventually makes its way back into the PC, unless you're using air conditioning.
 

P0tluck94

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Nov 22, 2021
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Take a picture of the inside of the PC - with the side panel removed, and post it here so we can all see the fan faces, coolers, etc.


I told you why: because open air models like that one dump all their waste heat inside the PC. Top exhaust should help get that out faster compared to intake.
That heated air will increase case ambient, which in turn, increases the operating temperature of everything else.
The heated air disperses into the room, increasing its ambient, and eventually makes its way back into the PC, unless you're using air conditioning.
View: https://imgur.com/a/SNeOpaA
 

P0tluck94

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Nov 22, 2021
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Take a picture of the inside of the PC - with the side panel removed, and post it here so we can all see the fan faces, coolers, etc.


I told you why: because open air models like that one dump all their waste heat inside the PC. Top exhaust should help get that out faster compared to intake.
That heated air will increase case ambient, which in turn, increases the operating temperature of everything else.
The heated air disperses into the room, increasing its ambient, and eventually makes its way back into the PC, unless you're using air conditioning.
Did I do the pictures correctly?
 
I'd argue the top two fans can be removed, but especially the one towards the top. If it's an exhaust, it's just sucking air from the intake. If it's an intake, it's interfering with the flow from the front. Though this is from my experience with my Fractal Design Meshify C that having a top fan didn't really contribute to overall cooling.

If controlling temperatures is what you're after, you could also look into power limiting or undervolting.
 

P0tluck94

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Nov 22, 2021
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I'd argue the top two fans can be removed, but especially the one towards the top. If it's an exhaust, it's just sucking air from the intake. If it's an intake, it's interfering with the flow from the front. Though this is from my experience with my Fractal Design Meshify C that having a top fan didn't really contribute to overall cooling.

If controlling temperatures is what you're after, you could also look into power limiting or undervolting.
The gpu gets to 75° while gaming, 35° at idle, 45°-55° just browsing or listening to music I know that's not hot I just don't want the fans running at 80%+ constantly and if I lower them the gpu gets hotter.

the rear fan next to the cpu cooler is exhaust, the top 2 are intakes, the front 2 are intakes they all have pretty much the same exact fan curves the bios, I see all these other cases with like 9+ fans how are they able to make theirs work and I can't use 5 without them canceling each other out? I did try to use the pc without the tops running earlier after recommendation and the system sensor went to 64° (what I have the case fans ran off of) which had the case fans at 75%, the system sensor don't reach 60° with them on, ship m literally just trying to get an idea of how they should be setup in the case to get the best airflow I can with what I have,, but phaaze is right in alot of points, my gpu doesn't have much breathing room between the fans and the psu bay top
 
The gpu gets to 75° while gaming, 35° at idle, 45°-55° just browsing or listening to music I know that's not hot I just don't want the fans running at 80%+ constantly and if I lower them the gpu gets hotter.

the rear fan next to the cpu cooler is exhaust, the top 2 are intakes, the front 2 are intakes they all have pretty much the same exact fan curves the bios, I see all these other cases with like 9+ fans how are they able to make theirs work and I can't use 5 without them canceling each other out? I did try to use the pc without the tops running earlier after recommendation and the system sensor went to 64° (what I have the case fans ran off of) which had the case fans at 75%, the system sensor don't reach 60° with them on, ship m literally just trying to get an idea of how they should be setup in the case to get the best airflow I can with what I have,, but phaaze is right in alot of points, my gpu doesn't have much breathing room between the fans and the psu bay top
It’s not just number of fans, it’s placement and what they do. Try two front intake, two exhaust rear and top rear, disconnect the top one closest to the front.