AMD Processors
Decrease font size
Increase font size
Topic Title: Feeling lucky.. and airflow tips...
Topic Summary:
Created On: 09/26/2009 10:11 PM
Status: Read Only
Linear : Threading : Single : Branch
Search Topic Search Topic
Topic Tools Topic Tools
View similar topics View similar topics
View topic in raw text format. Print this topic.
 09/26/2009 10:11 PM
User is offline View Users Profile Print this message

Author Icon
mattbeekler
Fanboi

Posts: 78
Joined: 02/15/2006

Today I was at microcenter picking up a few things for a client and stumbled upon some $2.99 140mm case fans, I needed one to completely fill all the fan placement areas in my coolermaster rc690. When I got home I threw the fan in, moved some other ones around to even it out and started playing some GTA 4. I looked over to my secondary monitor with the sidebar and the everest sidebar deal and saw my cpu at 42 celcius and thought that was kind of odd, it usually dosent get quite that high and it should be lower with the new fan. So I looked into the front of my case and saw that the fan on my Zalman was not even spinning! almost had a heart attack! When I was moving wires around one got caught in the fan and held it up! I feel pretty lucky about it, but thought that it was kind of interesting that running at a pretty heavy load I didn't even need the CPU Fan

Anyway, I was wondering if anyone else has this case or a similar one, and wondering about some airflow tips. I currently have this going:

140mm at bottom pulling air in
120mm in front of HDD pulling air in,
2 120mm on side pulling air in,
1 120mm on the back pulling air out
2 120mm on top pulling air out,
1 80mm behind the CPU pushing air in

I read somewhere that you want negative pressure in the case, but I'm not even sure that is really possible with this case, there is a lot of space for the air to get through, for now it seems to be keeping it cool enough, the ambient temp in the room is about 21 Celsius and im sitting contently at 23 Celsius at idle and up to 31 c at 100% load (everest stress test). I guess what I'm asking is if anyone has recommendations on how I should set these fans up, or if the way I'm doing it is best.

-------------------------
AMD Phenom II x4 940BE
Gigabyte MA-770 Mobo
8GB OCZ Reaper (1066)
GTS-250 1GB
Win7 64 Pro
 09/30/2009 04:40 PM
User is offline View Users Profile Print this message

Author Icon
NemesisChild
ROGue Warrior

Posts: 2978
Joined: 11/28/2008

I have the same case and the same CPU as you.
I'm running all 120mm fans in the same airflow direction as you, even with the 80mm mobo fan.
I also thought about replacing some of the 120mm fans with 140mm.
But I really don't see the need because the air flow movement is only marginally higher with 140mm fans.
Besides, I have yet to find a decent quality 140mm fan, at least on Newegg.
I'm running the original Cooler Master 120mm fans and added Ultra dual ball bearing 120mm fans in the extra slots.

I think you'll agree, this case has excellent airflow and although it's considered a mid-tower, it's really a small full size case.

-------------------------
Phenom II X6 1100T B.E.@ 4.26GHz
Corsair H70 Core Hydro
ASUS Crosshair V Formula
2x4GB G.Skill RipjawsX@ 1894MHz, 9-10-9-28
SLI: 2x EVGA GTX 570's@ 902/1804/2032
Creative SB X-Fi Xtreme Gamer
Corsair HX850W Modular
Cooler Master HAF 922
2x Win 7 Home Premium (x64)
 09/30/2009 06:45 PM
User is offline View Users Profile Print this message

Author Icon
geezer_wheelz
Elite

Posts: 1462
Joined: 09/23/2006

The only thing I would suggest is changing around the side fans.
As a rule the CPU fan is blowing air away from the CPU, so if you have side fans sucking air in then there is going to be a vortex being created right around the CPU area.

?



-------------------------
Asus M4A79 Deluxe, Phenom II 940 BE, 20,770 3D06

Asus Moderator ~ My CPU Overheating Guide
 09/30/2009 07:55 PM
User is offline View Users Profile Print this message

Author Icon
NemesisChild
ROGue Warrior

Posts: 2978
Joined: 11/28/2008

Originally posted by: geezer_wheelz

The only thing I would suggest is changing around the side fans.

As a rule the CPU fan is blowing air away from the CPU, so if you have side fans sucking air in then there is going to be a vortex being created right around the CPU area.



?



[IMG][/IMG]


True, but not with this case.
The two top exhaust fans are positioned directly above the CPU, exhausting the hot air that rises from the CPU.
My Arctic Freezer 64 Pro blows the hot CPU air directly into the 120mm rear performance fan.
On my setup, these three 120mm exhaust fans are power/performance fans, higher RPM and CFM than the side intake fans.

The lower side fan helps cool my 285, the top side fan provides cool air to the CPU/940.

Trust me man, it works extremely well.

-------------------------
Phenom II X6 1100T B.E.@ 4.26GHz
Corsair H70 Core Hydro
ASUS Crosshair V Formula
2x4GB G.Skill RipjawsX@ 1894MHz, 9-10-9-28
SLI: 2x EVGA GTX 570's@ 902/1804/2032
Creative SB X-Fi Xtreme Gamer
Corsair HX850W Modular
Cooler Master HAF 922
2x Win 7 Home Premium (x64)
 10/20/2009 10:59 PM
User is offline View Users Profile Print this message

Author Icon
sunnyyuan
Junior Member

Posts: 1
Joined: 10/20/2009

All experts! Thanks for the share.
 10/21/2009 12:31 AM
User is offline View Users Profile Print this message

Author Icon
PC-GURU -
Lurker

Posts: 8018
Joined: 11/11/2008

I use the push pull option with my CPU fans/HS.

Fan one blows the cool air into the HS's cooling fins and fan # 2 blows the warm air from the cooling fins and out the top exhaust fans.

Want to talk about coooooooooooooool my temps are just rocking.



Temps Idle clocks listed in sig



Temps in game listed in sig



It will be interesting to see how the 5870 HD effect these temps, if it can run as cool as the 285 GTX.

-------------------------
AMD phenom II 1090T @ 4.23 Ghz custom water cooled
Asrock 890 FX deluxe 3 mother board
4 GB DDR 3 1600 @ 1688 Mhz 7 7 7 24 T1 2688 Mhz NB
2x 1 TB WD Sata III 64 mb cache HDD,s raid 0
2x 5870 HD @ 1015/1300 Asus reference
Dual OS win 7 x64 ultimate & win 7 x32 Ultimate (bench os)
 10/21/2009 12:41 AM
User is offline View Users Profile Print this message

Author Icon
Moomanerism2
Stanley Hudson

Posts: 274
Joined: 09/17/2008

As far as airflow is concerned, you can draw similarities from properties of water-pumping equipment. Generally speaking, the fan in the front of the case is an intake simply because it's right in front of the 3.5" and/or 5.25" drive cages. Because air acts as a fluid, similar to a water-pump situation in small or obstructed areas, we can only efficiently draw air in from the outside to blow across the cages. Think of a fan as an air-pump, and as a pump, it can provide more pressure than vacuum, thus making it operate much more efficiently as an intake than an exhaust. Now that you understand why the front fan is typically an intake, you can use the same principles when orienting your fans in the rest of your chassis. If there is a fairly large obstruction inside by your fan, switch it from exhaust to intake. If it's a fairly open space next to the fan, take advantage of this and switch an intake to exhaust.

The two exceptions to this rule would be:
1) A fan in the side of your case that orients itself with the CPU. Almost always you want this to be intake.
2) The rear case fan. This needs to be exhaust, unless you have more than 3 case fans (not including a PCI slot exhaust blower as 1 of your 3 fans).

As air heats up, it expands and decreases density and effectively reducing the amount of heat energy the air can remove from the heatsink. Ask anyone who flies a C-5 out of the desert how hard it is to take off during the heat of day (actually good luck finding anyone who has). That being said, if you have sufficient air flow in your case (which would be reflected in case temps being within 4~5 degrees C of ambient temp), you can improve cooling efficiency of your current set up by running a higher static pressure inside your case. This is where you'd have all your fans intake besides the rear exhaust fan.

Good luck, hope that helped.

-------------------------
Supporting the Underdog
Gigabyte GA-MA790X-UD4P
720 Phenom II X3 (Unlocked to X4) w Zalman 9700LED 3.76Ghz (17.5X215)
Corsiar 520w PS
HIS 4850 (700/1133) w Fatal1ty FC-ZV9
4 GB XMS2 6400 + 4 GB G.Skill 6400 4-4-4-15
2 Seagate 500GB 7200.11 + 150GB Raptor
Westinghouse LCM-22w3
Fatal1ty 1010 mouse
 10/21/2009 09:18 AM
User is offline View Users Profile Print this message

Author Icon
dabob79
Deprecated

Posts: 463
Joined: 02/14/2009

"Ask anyone who flies a C-5 out of the desert how hard it is to take off during the heat of day..."

Now there's something to bring back memories, u AF Moomanerism2?

Bob

-------------------------
Phenom II X2 555 B.E. Unlocked to X4 @ 3.4GHz
ASUS M4A887-M/USB 3 Micro ATX MB
8GB G.Skill Ripjaws @1600Mhz, 7-7-7-21
Radeon HD 5570 1GB 128-bit DDR3 Graphics Card
Crucial 64GB SATA III SSD
OCZ ModXStream Pro 600W Modular PS
Silverstone HTPC Case
Statistics
112018 users are registered to the AMD Processors forum.
There are currently 1 users logged in.

FuseTalk Hosting Executive Plan v3.2 - © 1999-2014 FuseTalk Inc. All rights reserved.



Contact AMD Terms and Conditions ©2007 Advanced Micro Devices, Inc. Privacy Trademark information