Is having my CPU fan so close to the rear case fan a problem?

Toggle sidebar Toggle sidebar
M

MyTeaIsMighty

Reputable
May 26, 2016
21
0
4,510
Hey! As you can see in the picture my CPU and rear case fan are quite near to each other but at the minute I just have the stock cooler so there's no issues as of right now. But I plan on installing a hyper 212 evo because the sound it makes at load, while others may find tolerable and barely noticeable, I find quite annoying.

Problem being, I held the cooler above my current one and found that the fan on the EVO would be right in the rear case fan's face. I mean we're talking maybe about an inch of space between them.

So I was wondering if this was a bad thing? Will this negatively affect my computer in any way or would it be fine? Thanks in advance.

Picture here: http://imgur.com/a/GuV1n
 
Solution
madmatt30
All tower CPU coolers draw air into the heatsink & force it out the rear.

The fan should ALWAYS be at the front next to the ram slots.
Sort by date Sort by votes
M

MyTeaIsMighty

Reputable
May 26, 2016
21
0
4,510


Oh really? I thought the air blew out the fan. The more you know.
 
Upvote 0 Downvote
M

MRFS

Distinguished
Dec 13, 2008
1,333
0
19,360
You should NOT place 2 different fans in very close proximity on the same axis:
it is almost impossible to sync both fans to the same speed.

As a consequence, if the EVO fan is normally rotating faster than the chassis fan,
i.e. higher air flow,
the chassis fan will be forced to rotate at a speed dictated by the air flow
leaving the EVO fan and NOT at its rated speed.

If the EVO fan is normally rotating slower than the chassis fan,
the chassis fan will pull in air that is not directly exhausted by the EVO fan.

Also, the speed of the EVO fan should be controlled by the motherboard,
and you may induce annoying harmonics as the EVO fan changes speed
right next to the chassis fan.


The other comment you received is excellent advice:
move the EVO to the other side of that heatsink, and
use that fan position to "push" interior air into the heatsink.

In that position, you probably reduce the chances
of annoying harmonics as the EVO fan changes speed.



 
Upvote 0 Downvote
M

MyTeaIsMighty

Reputable
May 26, 2016
21
0
4,510


Ok thank you, that's good to know.

But just so I'm crystal clear, you're saying to have the fan component of the EVO heatsink facing AWAY from the chassis fan not TOWARD it?
 
Upvote 0 Downvote
scuzzycard

scuzzycard

Honorable
Feb 26, 2016
1,583
0
12,960
I think he means to have the EVO's fan mounted on the right-hand side, blowing through heatsink. Like this: https://www.google.com/search?q=hyper+212+evo&client=opera&biw=1691&bih=825&tbm=isch&imgil=grqOmTXVvNyEKM%253A%253BKZ4gx_Yj8-ANmM%253Bhttps%25253A%25252F%25252Fwww.youtube.com%25252Fwatch%25253Fv%2525253Dn47WBQI31eE&source=iu&pf=m&fir=grqOmTXVvNyEKM%253A%252CKZ4gx_Yj8-ANmM%252C_&usg=__EVGqPPnUrKltHHoONdln9i7gTPk%3D&ved=0ahUKEwiR8Ozose3OAhWH1B4KHR-jAQ0QyjcIPw&ei=R7bHV9GwGYepe5_Ghmg#imgrc=grqOmTXVvNyEKM%3A
 
Upvote 0 Downvote
M

MyTeaIsMighty

Reputable
May 26, 2016
21
0
4,510


Ah ok that's really good to know. Thanks a lot!
 
Upvote 0 Downvote
NerdIT

NerdIT

Distinguished
Jun 6, 2015
517
0
19,260


You would have to take off the 2 brackets on the EVO fan and screw it back onto the other side of fan. That way, when you put it on, its blowing the other direction i.e pushing/blowing into/through the heat-sink, and then your rear chassis fan would be pulling/exhausting the air coming out the other/backside of heat-sink.

Another possible option, is to add the secondary fan to the EVO, and remove your rear fan entirely. Although with your case (pun intended,... :p ) I would only do that if you have another fan on the side panel to add some air pressure and help push the air out the back, or pull it out the side., as it looks like you have no top exhaust fans.

Always keep in mind that hot air rise naturally, so your fan arrangement whatever that may be, make sure it doesn't contradict this.
 
Upvote 0 Downvote
NerdIT

NerdIT

Distinguished
Jun 6, 2015
517
0
19,260
I personally have the best results with having one fan on the EVO, as a pull config. You will get WAY less dust buildup then a push or true push/pull config. Although I removed my rear fan to do this -and I have front (intake), side (intake), and top (exhaust) chassis fans to assist in moving the hot air out the top.
 
Upvote 0 Downvote
madmatt30

madmatt30

Titan
Ambassador
Jan 1, 2013
24,574
650
91,240
^ you will never get the best results with a fan in pull.

Stand behind a standard house fan & feel the airflow as opposed to standing in front of it.
There will barely be any.

If you've followed your own advice above & removed the fan from the clip mount AND put it on the rear of the heatsink then you're still running a push configuration but you're pushing air from behind the cooler towards the ram.
 
Upvote 0 Downvote
NerdIT

NerdIT

Distinguished
Jun 6, 2015
517
0
19,260


I proposed a couple options, in the one fan pull config -you would have to switch the brackets back yes..- so the fan is blowing away/pulling air through and way from heatsink towards the back of case.
 
Upvote 0 Downvote
NerdIT

NerdIT

Distinguished
Jun 6, 2015
517
0
19,260
Here's Linus from LinusTechTips talking about push vs. pull vs. push/pull and dust buildup (last couple minutes of video) - I know hes talking about liquid cooling/rads - but the principal is the same -which is fans blowing against a surface (heatsink/radiator) as in push.

Worth a watch..

https://www.youtube.com/watch?v=UyC3lZ5WFMk

I run my EVO in pull with no rear fan, and my temps are about ~5-7C cooler than with push or push/pull (with or without rear fan).

 
Upvote 0 Downvote
madmatt30

madmatt30

Titan
Ambassador
Jan 1, 2013
24,574
650
91,240
I gained about 5c when I tried pull on the rear though so not always the same.
4 stick of corsair vengeance forced me to do that.

Changing the paste made the biggest difference , cooler master gel maker dropped 6c back off as opposed to the stuff with the evo.
Always said paste is paste before that but man that gel maker is good good stuff.
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom