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Fan upgrade for my HAF 932

post #1 of 21
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I'm looking to get some more air flowing through my HAF 932 with its stock fans. I have a Thermalright Archon on mounted in my CPU and I'd like to drop those temperatures a bit.

The only way I can think of doing this without going for fully blown water cooling is to swap out the stock fans for higher performance ones. The three stock 230mm fans are rated for 110CFM each and the rear 120mm is rated for 60CFM.

I also have an sli setup, so the fans on the window might make a difference. Basically, what are my upgrade options? 110CFM seems like quite a lot to me, but you can never have too much air flow right? biggrin.gif

Big caveat is that whatever fans I as to upgrade with have to be quite silent. My CPU cooler is rated for 21dbA, and the 230mm ones are around the same range. A little louder is fine, but I really want the quietest fans possible.

What are some choices for this?

Thanks in advance for any help.
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post #2 of 21
Just a quick comment, more airflow is not always true. There are thousands of articles discussing this and how just pushing a bunch of air around isn't always the best.

You want better fans, but they can't be very loud? That's kind of hard to do :/ Most well performing fans are loud(er). I can't give direct recommendations.

Most CPU temp issues are related to the actual cooler, but your's looks like a knockoff Noctua, lol. I've never looked up comparisons/reviews of that one, so I don't know what it normally does.

What exactly are the temps you're trying to lower? What overclock?
     
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post #3 of 21
I have a HAF932 as well and I added a Silverstone CFP51 in the front
http://www.silverstonetek.com/product.php?pid=40&area=en

My thread about it here:
http://www.overclock.net/t/1096509/build-log-silverstone-cfp51-v2-0-56k-warning/0_100

As well as replacing the front 230mm fan with a FN 200RB
http://www.nzxt.com/new/products/case_fans/fn_200rb

Another thing I did was to put 2 Yate Loons up on the top of the case bringing cool air directly into the H70 with the added shrouds. thumb.gif

For pictures of my rig you can either look at my rig on here, or in my Picasa Web Album here:
https://picasaweb.google.com/115339037662803158061/RIG
Edited by Semedar - 11/20/11 at 2:24pm
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post #4 of 21
Thread Starter 
Quote:
Originally Posted by TheJesus View Post

Just a quick comment, more airflow is not always true. There are thousands of articles discussing this and how just pushing a bunch of air around isn't always the best.
You want better fans, but they can't be very loud? That's kind of hard to do :/ Most well performing fans are loud(er). I can't give direct recommendations.
Most CPU temp issues are related to the actual cooler, but your's looks like a knockoff Noctua, lol. I've never looked up comparisons/reviews of that one, so I don't know what it normally does.
What exactly are the temps you're trying to lower? What overclock?

I'm trying to get my load temps at 4Ghz to about 60-65C. Right now, its at about 75 with HT on. The Archon is pretty much on par with the Silver Arrow or the D14. Its not very well known, but it performs quite well.
Quote:
Originally Posted by Semedar View Post

I have a HAF932 as well and I added a Silverstone CFP51 in the front
http://www.silverstonetek.com/product.php?pid=40&area=en
My thread about it here:
http://www.overclock.net/t/1096509/build-log-silverstone-cfp51-v2-0-56k-warning/0_100
As well as replacing the front 230mm fan with a FN 200RB
http://www.nzxt.com/new/products/case_fans/fn_200rb
Another thing I did was to put 2 Yate Loons up on the top of the case bringing cool air directly into the H70 with the added shrouds. thumb.gif
For pictures of my rig you can either look at my rig on here, or in my Picasa Web Album here:
https://picasaweb.google.com/115339037662803158061/RIG

Thanks for the links, I'll look into those.
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post #5 of 21
Re-do your thermal paste, those temps should not be happening. My friend's 920 was maxing under 70 with a stupid Hyper212 at 4GHz with the same case.

The best solution is liquid. He used the Rasa 240RS kit and his temps dropped 10-15C on both idle and load thumb.gif
     
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post #6 of 21
Thread Starter 
Thats the problem. i re-did my thermal paste twice already. Each time, temps have either gone down by one degree or none at all.

I don't know how much this would've affected my cooling, but when I was putting the whole thing together, I dropped the CPU face down where it hit the bottom lip of the case. There was a small scratch on the metal casing - almost a dent. I didn't think a little nick on the cpu would increase my temperatures that much.
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post #7 of 21
Trimming 10-15C from your CPU load temp (from current 75C to 60-65C) is an ambitious goal! Instead of increasing airflow into the case, I suggest improving on the airflow pattern.

To achieve the 10-15C drop, I strongly propose the air tunnel approach. Simply put, you setup a duct to link an additional intake fan (located inside the 5.25'' drive bays) to the push fan of the Archon.
403

Several considerations:-
a. The intake fan must have an airflow equal to or greater than the TY-140's so as to deliver sufficient cool ambient air to the Archon.
One good option is to use another TY-140. However, this is a 140mm fan and so it might be a little tight to fit it inside the 5.2'' drive bays. An alternative is to use a 120mm fan which is more easily installed space-wise. I see that your 932 has 4 empty drive bays and so this has sufficient space for this intake fan.

b.
The duct should have a diameter of 14'' to minimize 'head loss'.
You can either make one yourself with hard construction paper or use a dryer duct or an extendable plastic computer duct.

c. This tunnel ensures cool fresh air is sucked up by the Archon from the front intake fan. It also shields the Archon's intake fan from sucking hot air exhausted from the two GTS450s front being recirculated into the Archon.

A few members have tried this method and appear to have good result:-
http://www.overclock.net/t/975708/experimentally-determining-the-coldest-i-can-get-with-air
http://www.overclock.net/t/1142204/6-10-degrees-difference

If the front duct method provides good result for you, I suggest doing one for the exit end of Archon as well.
post #8 of 21
Thread Starter 
Wow, thanks for the extremely helpful diagram. Out of curiosity, how did you get the photo from my photostream? I don't have a link to it in my sig or anywhere... not complaining or anything, just curious how you came across it.

On topic:

Your theory of the tunnel approach makes sense to me. It makes sense why the Silver Arrow and the D14 are top notch coolers - their longer design means they'll be getting fresher air from the outside to push through. That brings up another question though - how would another tunnel at the back help the airflow? Since its exhaust, doesn't it not matter where the air is going? Especially since the hot air is almost immediately pushed out the rear? I also have another TY-140 added to the back of the Archon - the picture is a little old. Since that only dropped temperatures about 2 degrees, I could use that to make my tunnel instead of buying a new one.

A dryer duct does seem like a nice way to funnel the air directly to the Archon but it doesn't seem like the most aesthetic option.

Another small option would be to flip the top fan to an intake. I don't know how much of an effect that'll have, but it is better than nothing.

Again, thanks for extremely helpful diagram.

EDIT: I looked at the cooler from the front of my case and there's a little problem that'll arise with the duct method. The Corsair Vengeance RAM is quite tall so the heat-spreaders rise about 3/4 of an inch above the bottom of the front TY-140. That means I won't be able to attach a duct to the front. I'll take a couple photos of this in a little while and post them here. I don't think my words explain it all that well.

EDIT 2: A small question - I read through the posts you linked above, and does the duct sizing 120mm, 140mm, 92mm etc, refer to the diameter of the duct? I've never actually bought any sort of duct before, so this is all new to me.
Edited by shinigamibob - 11/20/11 at 4:35pm
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post #9 of 21
I grab that pic from your Flickr album mentioned by your post #253 here:-biggrin.gif
http://www.overclock.net/t/933510/thermalright-archon-club/250


Regarding using a duct at the exit end

This duct not only links the Archon with the case rear exhaust fan but also extends to the outside of the case. See the illustration below.
410

This duct serves 2 purposes:-

a. To suck air out from the heatsink fins
You need to use either a case rear fan (as shown in the pic) or using a 'pull' fan (as you are already using). In your case, this part alone produces 2C drop.

b. To channel those hot air further away
If your 932 has a wall to its back and if ventilation to space between the case and the wall is not ample (which is usually the situation for most people), then hot air will be accumulated in that region, remembering graphics cards and the PSU all dump hot air to that space. Having a higher temp zone on the rear/exhaust end of the heatsink is not beneficial because the 'thermal gradient' is reduced. I suggest that the cooling benefit due to maximized thermal gradient should be taken advantage of in order to achieve the 10-15C drop. No gain is too small to be ignored.

To ensure sufficient exit airflow velocity, you will need to put another fan at the very end of this tunnel. That fan, of course, needs to have at least 75 CFM.
This thread is a relevant reading:- http://www.overclock.net/t/1028622/thermal-management-outside-a-case


To answer your 2 questions
1) The duct does not have to be 100% straight. If it is not made of hard construction paper but of plastic, it is flexible and can 'float' over' the tall RAM heat spreaders like the diagram below. But I will wait for your pictures to see how tight the space actually is.
478
2) 92/120/140mm refer to the diameter of the duct
Edited by windfire - 11/20/11 at 5:57pm
post #10 of 21
Thread Starter 
I re-looked at how the cooling is set up, and to me, other than the front 4 bays with no fan, the only real intake is from the front 230mm fan. However, behind that, there are 6 hard drives. So basically, the most significant volume of air that's entering the case is through the front 230mm which has been pre-heated by 6 hard drives. Plus, this is directly below the two video cards which I would assume heats up the air even more. The only consolation to this would be the 230mm fan on the side panel, but this blows almost directly onto the video cards.

And you were right about the air flow restriction out the back. There's not a whole lot of space behind the rear fan and the wall. To further complicate this, the top 230mm fan has about 2 inches of clearance against a top enclosure. The side panel has even less, about half an inch of clearance between it and a sidewall. This thing is boxed in on 4 sides, with the only open end being the front and back. Unfortunately, I have no chance of moving it elsewhere because that is the only place for me to keep it.

Here you can see the RAM clearance from the front
6374072143_f8cdf733af_b.jpg

And from the side (this photo is a bit old, there are 3 more RAM modules in there as of now)
5563183158_418a45f07d_b.jpg

And finally, its current resting place:
6374069515_66eba22cfa_b.jpg

The top isn't visible in the last one, but there is about the same clearance from the top as from the side. Like I said, only the front is really open.
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