Overclock.net › Forums › Cooling › Air Cooling › Is adding too many case fans noisy regardless of low dba?
New Posts  All Forums:Forum Nav:

Is adding too many case fans noisy regardless of low dba?

post #1 of 12
Thread Starter 
Hey guys just about finished with my setup, just got a question i own a HAF 932 case it is awesome...I decided im going to overclock the **** out of my cpu and video card, so i have my cooling setup this way:

PSU on top with a 140mm-intake
120mm next to the psu on top-intake
2 x 140mm on front bythe drive bay push-pull config (dont know if thats a waste,probably just leave one).-intake
230 mm on the bottom front- intake
2 x 120 mm on bottom-intake
3 x 120 mm fans on the side for intake
2 x 120mm in rear push pull config-exhaust (Corsair H70)

Note: Rear panel are all ventilated to the fullest, what i'm trying to accomplish is a positive air cooling all around to keep my components as cool as possible with air coming in from the outside, then let all the negative air go through the rear this way my components will not in take as much warm air.

Also note my 230mm are my stock coolermaster blue led-1, 700 RPM, 110 CFM, 19 dBA.

My 120 mm (exception of corsair in rear)- 1500+ 10% rpm, 57.67 cfm, 24.7 dba (fairly quiet havent tested all of them at the same time yet

my 140 mm are coolermaster stock-1200 RPM, 60 CFM, 17 dBA

is this setup going to make my pc noisy even though my case fans are quiet? also, what do you guys think about intaking positive air all around and having negative air exhaust from rear?
Edited by Aknolidge - 2/9/11 at 7:03am
overclocking toy
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7-950 Asus P6TD Deluxe MSI GTX 560 TI Corsair XMS3 12gb DDR3 
Hard DriveOptical DriveOSMonitor
1.5 TB @7200 RPM Blu-Ray/DVD/CD + Burner Windows 7 Asus 27" LED 
PowerCase
Corsair HX 850 Coolermaster HAF 932 
  hide details  
Reply
overclocking toy
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7-950 Asus P6TD Deluxe MSI GTX 560 TI Corsair XMS3 12gb DDR3 
Hard DriveOptical DriveOSMonitor
1.5 TB @7200 RPM Blu-Ray/DVD/CD + Burner Windows 7 Asus 27" LED 
PowerCase
Corsair HX 850 Coolermaster HAF 932 
  hide details  
Reply
post #2 of 12
To answer your question, no. You can add as many fans as you desire, as long as they are silent in operation (ie producing less noise in dBA than you can hear) and you won't hear a thing. However, you will hear the air moving. Around your H70 for instance. The air moving across the rad will make some noise.

The push/pull over your 5.25 drives should be scrapped. Leave one there but unless you have a rad mounted there too, one fan (depth wise) is sufficient.

Let me ask though, why are you exhausting all your hot air through your radiator? Seems a little inefficient. I have all the air in my case (HAF 932) exhausting out the back too, but I have a very high CFM fan back there, and I have cool air coming from the outside of my case through my rad mounted on top.
    
CPUMotherboardGraphicsRAM
[INTEL] i7 930, 4.4ghz @ 1.27V [Asus] Rampage III Extreme [Sapphire] 2X 6950's Flashed to 6970's @950/1425 [G.SKILL] Ripjaws X Series 12GB DDR3 @ 2133 
Hard DriveOptical DriveOSMonitor
[Crucial] 2X C300's in Raid0 & [Samsung] 2X 1TB F3 [Hewlett-Packard] DVD-RW [Microsoft] Windows 7 64-bit [Asus] 3X 23" LCD 
KeyboardPowerCaseMouse
[Microsoft] Sidewinder X6 [Kingwin] Lazer LZ-1000 [Xigmatek] Elysium (Being Modded) [Microsoft] Sidewinder 
Mouse Pad
[XTrac] Ripper 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
[INTEL] i7 930, 4.4ghz @ 1.27V [Asus] Rampage III Extreme [Sapphire] 2X 6950's Flashed to 6970's @950/1425 [G.SKILL] Ripjaws X Series 12GB DDR3 @ 2133 
Hard DriveOptical DriveOSMonitor
[Crucial] 2X C300's in Raid0 & [Samsung] 2X 1TB F3 [Hewlett-Packard] DVD-RW [Microsoft] Windows 7 64-bit [Asus] 3X 23" LCD 
KeyboardPowerCaseMouse
[Microsoft] Sidewinder X6 [Kingwin] Lazer LZ-1000 [Xigmatek] Elysium (Being Modded) [Microsoft] Sidewinder 
Mouse Pad
[XTrac] Ripper 
  hide details  
Reply
post #3 of 12
Thread Starter 
Quote:
Originally Posted by Senator View Post
To answer your question, no. You can add as many fans as you desire, as long as they are silent in operation (ie producing less noise in dBA than you can hear) and you won't hear a thing. However, you will hear the air moving. Around your H70 for instance. The air moving across the rad will make some noise.

The push/pull over your 5.25 drives should be scrapped. Leave one there but unless you have a rad mounted there too, one fan (depth wise) is sufficient.

Let me ask though, why are you exhausting all your hot air through your radiator? Seems a little inefficient. I have all the air in my case (HAF 932) exhausting out the back too, but I have a very high CFM fan back there, and I have cool air coming from the outside of my case through my rad mounted on top.
Makes sense what you're saying.In other words you suggesting i should switch the rad to the top instead of having it in the rear?
overclocking toy
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7-950 Asus P6TD Deluxe MSI GTX 560 TI Corsair XMS3 12gb DDR3 
Hard DriveOptical DriveOSMonitor
1.5 TB @7200 RPM Blu-Ray/DVD/CD + Burner Windows 7 Asus 27" LED 
PowerCase
Corsair HX 850 Coolermaster HAF 932 
  hide details  
Reply
overclocking toy
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7-950 Asus P6TD Deluxe MSI GTX 560 TI Corsair XMS3 12gb DDR3 
Hard DriveOptical DriveOSMonitor
1.5 TB @7200 RPM Blu-Ray/DVD/CD + Burner Windows 7 Asus 27" LED 
PowerCase
Corsair HX 850 Coolermaster HAF 932 
  hide details  
Reply
post #4 of 12
No, Adding many case fans does not necessarily make your PC noisier. As long as the fans are low dbA, you shouldn't be hearing them.
post #5 of 12
Fan noise is not linear but logarithmic. There is no such thing as a silent fan. They are just inaudible by themselves. However, lots of inaudible fans can become audbile.

i.e. 15dB + 20dB + 25dB = 26.5dB

http://www.noisemeters.com/apps/db-calculator.asp
Once again...
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 [4.28GHz, HT] Asus P6T + Broadcom NetXtreme II VisionTek HD5850 [900/1200] + Galaxy GT240 2x4GB G.Skill Ripjaw X [1632 MHz] 
Hard DriveOSMonitorKeyboard
Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
PowerCaseMouseMouse Pad
Antec Truepower New 750W Li Lian PC-V2100 [10x120mm fans] Logitech G9 X-Trac Pro 
  hide details  
Reply
Once again...
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 [4.28GHz, HT] Asus P6T + Broadcom NetXtreme II VisionTek HD5850 [900/1200] + Galaxy GT240 2x4GB G.Skill Ripjaw X [1632 MHz] 
Hard DriveOSMonitorKeyboard
Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
PowerCaseMouseMouse Pad
Antec Truepower New 750W Li Lian PC-V2100 [10x120mm fans] Logitech G9 X-Trac Pro 
  hide details  
Reply
post #6 of 12
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
Fan noise is not linear but logarithmic. There is no such thing as a silent fan. They are just inaudible by themselves. However, lots of inaudible fans can become audbile.

i.e. 15dB + 20dB + 25dB = 26.5dB

http://www.noisemeters.com/apps/db-calculator.asp

Hey thanks for that calculator i've calculated all my fans and came up with a range of 30-35 dba range
overclocking toy
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7-950 Asus P6TD Deluxe MSI GTX 560 TI Corsair XMS3 12gb DDR3 
Hard DriveOptical DriveOSMonitor
1.5 TB @7200 RPM Blu-Ray/DVD/CD + Burner Windows 7 Asus 27" LED 
PowerCase
Corsair HX 850 Coolermaster HAF 932 
  hide details  
Reply
overclocking toy
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7-950 Asus P6TD Deluxe MSI GTX 560 TI Corsair XMS3 12gb DDR3 
Hard DriveOptical DriveOSMonitor
1.5 TB @7200 RPM Blu-Ray/DVD/CD + Burner Windows 7 Asus 27" LED 
PowerCase
Corsair HX 850 Coolermaster HAF 932 
  hide details  
Reply
post #7 of 12
Quote:
Originally Posted by DuckieHo View Post
Fan noise is not linear but logarithmic. There is no such thing as a silent fan. They are just inaudible by themselves. However, lots of inaudible fans can become audbile.

i.e. 15dB + 20dB + 25dB = 26.5dB

http://www.noisemeters.com/apps/db-calculator.asp
Your right ofc, but it's going to be more complicated than that. While there is no such thing as a silent fan, there are several fans that I cannot hear when spinning. If he has several fans at 20dBA, for the sake of debate: 10fans, then adding all of those together won't be a static equation totaling 30dBA unfortunately. Several other variables would factor in and I'm quite sure the math would give me a headache.

Adding all of his fans together won't be an issue at all, as long as they are quality low dBA, high CFM fans.





And yes, I would move your radiator to the top and make the sure that fan at the back is a very high CFM 120mm or 140mm (preferably).
    
CPUMotherboardGraphicsRAM
[INTEL] i7 930, 4.4ghz @ 1.27V [Asus] Rampage III Extreme [Sapphire] 2X 6950's Flashed to 6970's @950/1425 [G.SKILL] Ripjaws X Series 12GB DDR3 @ 2133 
Hard DriveOptical DriveOSMonitor
[Crucial] 2X C300's in Raid0 & [Samsung] 2X 1TB F3 [Hewlett-Packard] DVD-RW [Microsoft] Windows 7 64-bit [Asus] 3X 23" LCD 
KeyboardPowerCaseMouse
[Microsoft] Sidewinder X6 [Kingwin] Lazer LZ-1000 [Xigmatek] Elysium (Being Modded) [Microsoft] Sidewinder 
Mouse Pad
[XTrac] Ripper 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
[INTEL] i7 930, 4.4ghz @ 1.27V [Asus] Rampage III Extreme [Sapphire] 2X 6950's Flashed to 6970's @950/1425 [G.SKILL] Ripjaws X Series 12GB DDR3 @ 2133 
Hard DriveOptical DriveOSMonitor
[Crucial] 2X C300's in Raid0 & [Samsung] 2X 1TB F3 [Hewlett-Packard] DVD-RW [Microsoft] Windows 7 64-bit [Asus] 3X 23" LCD 
KeyboardPowerCaseMouse
[Microsoft] Sidewinder X6 [Kingwin] Lazer LZ-1000 [Xigmatek] Elysium (Being Modded) [Microsoft] Sidewinder 
Mouse Pad
[XTrac] Ripper 
  hide details  
Reply
post #8 of 12
Thread Starter 
Quote:
Originally Posted by Senator View Post
Your right ofc, but it's going to be more complicated than that. While there is no such thing as a silent fan, there are several fans that I cannot hear when spinning. If he has several fans at 20dBA, for the sake of debate: 10fans, then adding all of those together won't be a static equation totaling 30dBA unfortunately. Several other variables would factor in and I'm quite sure the math would give me a headache.

Adding all of his fans together won't be an issue at all, as long as they are quality low dBA, high CFM fans.





And yes, I would move your radiator to the top and make the sure that fan at the back is a very high CFM 120mm or 140mm (preferably).

Understood. Again im completely new when it comes to building a pc from scratch, everyday i learn something new. Thanks for the replies everyone. When i get home i will be doing some adjusting.
overclocking toy
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7-950 Asus P6TD Deluxe MSI GTX 560 TI Corsair XMS3 12gb DDR3 
Hard DriveOptical DriveOSMonitor
1.5 TB @7200 RPM Blu-Ray/DVD/CD + Burner Windows 7 Asus 27" LED 
PowerCase
Corsair HX 850 Coolermaster HAF 932 
  hide details  
Reply
overclocking toy
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7-950 Asus P6TD Deluxe MSI GTX 560 TI Corsair XMS3 12gb DDR3 
Hard DriveOptical DriveOSMonitor
1.5 TB @7200 RPM Blu-Ray/DVD/CD + Burner Windows 7 Asus 27" LED 
PowerCase
Corsair HX 850 Coolermaster HAF 932 
  hide details  
Reply
post #9 of 12
Basically you'll hear the loudest thing all the time.
post #10 of 12
Thread Starter 
Quote:
Originally Posted by Senator View Post
Your right ofc, but it's going to be more complicated than that. While there is no such thing as a silent fan, there are several fans that I cannot hear when spinning. If he has several fans at 20dBA, for the sake of debate: 10fans, then adding all of those together won't be a static equation totaling 30dBA unfortunately. Several other variables would factor in and I'm quite sure the math would give me a headache.

Adding all of his fans together won't be an issue at all, as long as they are quality low dBA, high CFM fans.





And yes, I would move your radiator to the top and make the sure that fan at the back is a very high CFM 120mm or 140mm (preferably).

Do you guys think i should put my psu on the bottom upside down, so this way it will intake cold air inside the chassis? This way i can put my radiator on top where the psu is currently mounted.
overclocking toy
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7-950 Asus P6TD Deluxe MSI GTX 560 TI Corsair XMS3 12gb DDR3 
Hard DriveOptical DriveOSMonitor
1.5 TB @7200 RPM Blu-Ray/DVD/CD + Burner Windows 7 Asus 27" LED 
PowerCase
Corsair HX 850 Coolermaster HAF 932 
  hide details  
Reply
overclocking toy
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7-950 Asus P6TD Deluxe MSI GTX 560 TI Corsair XMS3 12gb DDR3 
Hard DriveOptical DriveOSMonitor
1.5 TB @7200 RPM Blu-Ray/DVD/CD + Burner Windows 7 Asus 27" LED 
PowerCase
Corsair HX 850 Coolermaster HAF 932 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Air Cooling
Overclock.net › Forums › Cooling › Air Cooling › Is adding too many case fans noisy regardless of low dba?