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03-28-2007, 11:05 PM
| #1 (permalink) |
| Newb Techie Join Date: Jul 2005
Posts: 16
|  Do I want pos / neg case pressure? Hello. I recently got a new case, just a black chassis, nothing special. There are three places for fans, one front (where the "on" button is) one back (where the mobo ports are) and one side. I know that I want the front fan blowing in and the back fan pulling air out, but I do not know about the side fan. It would be blowing directly ontop of my processor fan, and I don't want that. So If i put it to pulling air out of the case, my case would have a negative pressure inside, correct? I will probably get a PCI slot cooler and a video card that has a fan on top that pulls air out of the case as well. So... that side fan, should it blow in, or out? Thanks in advance, Seth. |
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03-29-2007, 12:58 AM
| #3 (permalink) | |
| Super Moderator  Join Date: May 2005 Location: Locked in a dungeon, Perth
Posts: 7,883
| Re: Do I want pos / neg case pressure? i say keep the side fan as an intake. have the front as an intake and the rear as an exhaust. it's good to have air from the side fan blowing directly onto the heatsink as the heatsink fan sucks air in not out.
__________________ Get FireFox Saxon's Blog|Saxon's Forum - CHECK IT OUT! Fold for tech forums. MY COMPUTER HELPS CURE CANCER! "Sniffing Powdered Ubuntu CDs Cures Cancer!" - TuxMachines.org /Q6600@3.0GHz/2x1GB Kingston DDR2-800/Gigabyte P35-DS3R/XFX 7900GS 256MB|Antec TPII 480w\2x250gb+80gb WD Caviar\WinFast DTV-1000T\TT Soprano\ I'm sorry but I do not accept support requests via IM, email, or personal messages You can contact me for Forum related issues via PM only.   Quote:
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03-29-2007, 08:02 AM
| #4 (permalink) |
| True Techie Join Date: May 2006
Posts: 233
| Re: Do I want pos / neg case pressure? definately side fan intake. You think they positioned it near the CPU by coincidence? Think of the heatsink as a hot piece of metal, and the only way you can cool it down is by blowing air over it. Now give me the logic for 'not wanting to have it as an intake'... |
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03-29-2007, 08:18 AM
| #5 (permalink) |
| Memberbot  Join Date: Mar 2004
Posts: 4,061
 | Re: Do I want pos / neg case pressure? I agree with having the side fan as an intake as long as it sits over the CPU (and CPU heatsink). Since the CPU fan actually blows towards the CPU to cool it, you should have the side fan feed cool, outside air towards the CPU fan.
__________________  Intel E6750...........PSN: ELBATROP XFX nForce 650i Ultra Kingston PC2-6400 2GB eVGA 9800GT 36GB WD Raptor 120GB SG 250GB WD Logitech X-530 Samsung SyncMaster 931c Samsung SyncMaster 750s Last edited by Elbatrop1; 03-30-2007 at 12:24 PM. |
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03-29-2007, 10:25 AM
| #6 (permalink) |
| Commander SMod  Join Date: Nov 2004 Location: New York City
Posts: 11,801
 | Re: Do I want pos / neg case pressure? I have two side fans. The one on side top, in front of the CPU, is an exhaust. The one on side bottom, in front of the graphic card is intake. So you're saying I should reverse this? Also I thought that, having the side fan blowing air on the graphic card, will cool it down, in addition to the front intake. |
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03-29-2007, 03:28 PM
| #7 (permalink) | |
| Super Techie  Join Date: Feb 2007 Location: Neza
Posts: 423
| Re: Do I want pos / neg case pressure? Quote:
__________________ e6600@3.4 24/7 w/stock cooling 2g Transcend Memory 3 hd's, 80-XP Pro, 500 and 320-Apps,Pics, Music, Videos GeForce 6200 128mb-I DON'T GAME! Ultra PS, Ultra Mid Tower Case Lite-on internal DVD-R, Samsung Lite-Scribe Ext. DVD-R 32" Olevia Monitor AKA HDTV. For HTPC Sharp 56" DLP | |
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03-30-2007, 12:44 AM
| #8 (permalink) |
| Renowned Budgeting Master  Join Date: Nov 2006 Location: Uniontown, PA
Posts: 4,120
| Re: Do I want pos / neg case pressure? My Arctic Freezer Pro 7 had a diagram once on how my airflow should go for optimal airflow. it showed the front and side fan as intake, and the PSU and back fans for exhaust. They were saying that that was the best temps for an after market cooler such as it.
__________________ E6300 w/ Arctic Freezer Pro 7 @ 3.6ghz 1.4Vcore Antec 900 Case EVGA 750i FTW Mobo 2x1GB of DDR2-533 D9GMH Team Xtreme 4-4-4-12 @ 1030mhz 2.2v Gigabyte 8800GT 720/1800/1050 (eventually will SLI when they go down in price) Hanns G 19" Wide 5MS LCD 1 250GB WD and 1 Seagate 7200.10 in RAID 0 Corsair 520HX 3DMark06 Score: 13900 |
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03-31-2007, 06:11 PM
| #10 (permalink) |
| Monster Techie  Join Date: Feb 2006 Location: UK
Posts: 1,745
| Re: Do I want pos / neg case pressure? side fan blowing in definitely, cools the ram and feeds cooler air to the cpu cooler. Personally I have 2 intake fans at the front, and exhaust fan at the top and one at the back. I would mod a side fan but i'm too lazy
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