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I want to get a new case but I have question about the two preinstalled 3pinned 120mm/140mm fans.

post #1 of 7
Thread Starter 
Right now I have the Antec Three Hundred it has also 120mm/140mm TriCool fans with a 3-speed switch control. These fans connect directly to the psu. I run these fans on low and are very quiet and suit my needs for cooling.

I want a new case and I've chosen the Corsair Carbide Series 300R this case also has 120mm/140mm fans but they hook up to mobo with 3pin connectors.

Am I correct to assume 3pin fans rpm is fixed with no variable speeds ? If so can I adjust the speed in the bios ? My concern is that pc will be to loud if it's fixed speed and I can't adjust it. thanks
Edited by Subzero11 - 10/12/12 at 1:09pm
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post #2 of 7
I have a Asus board and the Corsair 300R.

The 3-pin fans will run at full blast connected to the PSU without properly adapter to reduce fan speed.

The Chassis Fan header controls both 3-pin or 4-pin PWM fans.
Usually the Asus Board CPU Fan header controls only 4-pin PWM fans.
The 3-pin fan headers connected to the CPU Fan header will run at full speed.

The 300R stock fans are 3-pin fans.
It's quiet for me even at full speed.
Both fans hooked to the Chassis Fans is very quiet at 60%. Can't really hear the fans.

Any fan hooked to the board fan header could also controlled using the utility Asus Suite II / Fan Expert.

The 300R supports 2 top 120mm/140mm fans.
One top fan location is near the front panel and the other top fan location is near the rear case.

If the DVD drive is placed at the first drive bay, can't fit a standard 140x140x25 fan at the top front location.
But It still fits a standard 120x120x 25 fan.

If the DVD drive is placed below the first drive bay, It's fits the 120mm or 140mm fan.
Edited by edsai - 10/12/12 at 3:01pm
300R Rig
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CPUMotherboardRAMHard Drive
Core I5 3570K Asus P8Z77-V LX Corsair Vengeance 8GB 1600 MHz DDR3 Seagate 2T 7200 RPM SATA 3 
Optical DriveCoolingCase
DVD R/W Sony Hyper 212+ Push Pull Corsair 300R 
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300R Rig
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CPUMotherboardRAMHard Drive
Core I5 3570K Asus P8Z77-V LX Corsair Vengeance 8GB 1600 MHz DDR3 Seagate 2T 7200 RPM SATA 3 
Optical DriveCoolingCase
DVD R/W Sony Hyper 212+ Push Pull Corsair 300R 
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post #3 of 7
Thread Starter 
I have Asus P8P67 that has two chassis fan connectors labeled 4-pin CHA_FAN1 and the other labeled 3-pin CHA_FAN2 I guess I'm suppose to use these for the two fans thats in the Corsair 300R.

Why are one of the connectors a 4-pins and the other one is a 3-pin ? most of cases I'm looked at are 3-pins fans except for the cases that connect directly to the psu but thats another matter though.

QUOTE:
''Any fan hooked to the board fan header could also controlled using the utility Asus Suite II / Fan Expert''.

This utility is that in the bios or in windows ?

QUOTE:
''Both fans hooked to the Chassis Fans is very quiet at 60%. Can't really hear the fans.''

So your running your two case fans at 60% so you using Asus Suite II / Fan Expert utility control them ? So if you got them going 60% I take it that at 100%it's kinda to loud ?

thanks
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post #4 of 7
The 300R stock fans is quiet even at full blast.
But my board Chassis Fan can still control these fans.
The default speed fan from the bios or Fan Xpert standard profile is 60%.

Is this your board?

http://www.asus.com/Motherboards/Intel_Socket_1155/P8P67/

The Asus Suite II can be also downloaded on this site.
It's a utility for Windows.
This utility has the Fan Xpert to monitor and control fan speeds.

You can also monitor and control fan speed in the bios.

My board only has two 4-pin Chassis Fan. It doesn't have a 3-pin Chassis Fan.
I dunno about your board 3-pin CHA_FAN2. Maybe the fan (3-pin or 4-pin) will run at full speed.
I believe that you would only control the 4-pin CPU_FAN and the 4-pin CHA_FAN1.
You would only monitor the 3-pin CHA_FAN2 in the bios or in the Asus Fan Xpert.

The heatsink fan hooked in the 4-pin CPU_FAN must be a 4-pin fan to be controlled.
The 4-pin Chassis Fan controls the 3-pin or the 4-pin fan.

Well, there is a PWM fan splitter cable from Akasa (AK-CBFA04-15) that works on my 4-pin CPU_FAN and 4-pin Chassis Fan.

http://www.akasa.com.tw/search.php?seed=AK-CBFA04-15

This cable connects two fans to single fan header.
Ensure total current consumption of both fans does not exceed the fan header maximum output.
If not specified by your board, consider the maximum fan power by 1A (12W).

You can control the two fans. One of the fans reports the rpm to the motherboard.
My board controls two fans (3-pin or 4-pin) hooked in the 4-pin Chassis Fan with this cable.
My board also controls two 4-pin fans hooked in the 4-pin CPU Fan with this cable.
Edited by edsai - 10/12/12 at 6:04pm
300R Rig
(7 items)
 
  
CPUMotherboardRAMHard Drive
Core I5 3570K Asus P8Z77-V LX Corsair Vengeance 8GB 1600 MHz DDR3 Seagate 2T 7200 RPM SATA 3 
Optical DriveCoolingCase
DVD R/W Sony Hyper 212+ Push Pull Corsair 300R 
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Reply
300R Rig
(7 items)
 
  
CPUMotherboardRAMHard Drive
Core I5 3570K Asus P8Z77-V LX Corsair Vengeance 8GB 1600 MHz DDR3 Seagate 2T 7200 RPM SATA 3 
Optical DriveCoolingCase
DVD R/W Sony Hyper 212+ Push Pull Corsair 300R 
  hide details  
Reply
post #5 of 7
Thread Starter 
Yay thats my board. Well if what you say about the default speed fan from the bios 60% is right then I got nothing to worry about probably. The only thats it's too it's because it's running at 100% I've read reviews about the case no one really said much about the fans. Worst case I could just buy replacement fans I already have a extra 120mm Noctua fan that I'm using. Are most fans of the same size totally interchangable ?

I have the Noctua NH-U12P SE2 120mm SSO CPU Cooler for cpu and it's a 3-pin fan but I plugged it in the 4-pin cpu fan connect on the board. So if you say it takes a 4-pin fan to control the speed then I guess Noctua NH-U12P SE2 is running at full speed then, but it's very quiet. Corsair 300R is a nice case but the fans they use are not the same quality. My Noctua NH-U12P SE2 cost as much as the case.

I don't want to install a program to control a fan, it will just another thing I got to mess with.

So this is what I'm doing I will plug the 3-pin 120mm in the 4-pin CHA_FAN1 thats near it and the other 3-pin 140mm 3-pin CHA_FAN2. So by default you think both these fans will run at 60% and the speed won't fluctuat ? You did say also that if it's a 3-pin it could blow full speed. I thought I've read before that 3-pin fans is full speed never controlable that it had to be a 4-pin. I maybe worrying about this to much, I've known to return stuff back to store many times cause componets making to much noise.
SSF
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CPUMotherboardGraphicsRAM
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Seagate 2TB 7200.14 ASUS DRW-24B1ST Noctua NH-U12S Windows 7 Home Premium 64-bit  
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BenQ GW2470 Standard black keyboard SeaSonic G Series 550W Fractal Arc Midi R2  
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SSF
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CPUMotherboardGraphicsRAM
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Hard DriveOptical DriveCoolingOS
Seagate 2TB 7200.14 ASUS DRW-24B1ST Noctua NH-U12S Windows 7 Home Premium 64-bit  
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BenQ GW2470 Standard black keyboard SeaSonic G Series 550W Fractal Arc Midi R2  
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post #6 of 7
1) I've read reviews about the case no one really said much about the fans.

These are the stock fans:

140mm Corsair A1425L12S 1000 RPM
120mm Corsair A1225M12S 1200 RPM

2) Are most fans of the same size totally interchangable?

Yes, I have no issues with another 120mm and 140mm fans.

You will found all fan screws from the accessory kit.

There are 4 long screws for a second optional front fan.
The front fan must be 120x120x25 or 140x140x25.
If the fan profile is higher than 25mm you can't use these long screws.

The other screws are small, they are only common screws for the other case fans.

If you need you could also purchase some extra screws or other accessories.

http://www.corsair.com/en/carbide-300r-accessory-kit.html
http://www.corsair.com/en/catalogsearch/result/?q=300r

3) Corsair 300R is a nice case but the fans they use are not the same quality.

You are right.
These fans aren't great but could still work fine as case fans.

The 300R has only 2 stock fans so no problem to replace them for others fans that you like or performs better.

4) I have the Noctua NH-U12P SE2 120mm SSO CPU Cooler for cpu and it's a 3-pin fan but I plugged it in the 4-pin cpu fan connect on the board.

Yes, I believe that the fan is running at full blast.

I heard there are boards from Gigabyte could control 3-pin fans, but I don't known about Asus board doing It.
You could also check the fan rpm on the bios or the Fan Expert.

So I believe that you will have no issues with the 300R stock fans.

5) I don't want to install a program to control a fan, it will just another thing I got to mess with.

Yes, you no really need to install It.
But If you want you can use It only to see the fan speeds.

6) So by default you think both these fans will run at 60% and the speed won't fluctuat ?

I believe the fan hooked in the 3-pin CHA_FAN2 will run always at max rpm.

The fan hooked in the CHA_FAN1 will be controlled by the board.
The board could increase the fan speed if the processor reaches higher temps and drop the speed if the processor reaches lower temps.

Well, I believe you will no need to worry because the fans don't have high rpm.
If you need just replace them with fans that you like.

There are also cable adapters to reduce fan speed.
Some fans are sold with these cable adapters.
300R Rig
(7 items)
 
  
CPUMotherboardRAMHard Drive
Core I5 3570K Asus P8Z77-V LX Corsair Vengeance 8GB 1600 MHz DDR3 Seagate 2T 7200 RPM SATA 3 
Optical DriveCoolingCase
DVD R/W Sony Hyper 212+ Push Pull Corsair 300R 
  hide details  
Reply
300R Rig
(7 items)
 
  
CPUMotherboardRAMHard Drive
Core I5 3570K Asus P8Z77-V LX Corsair Vengeance 8GB 1600 MHz DDR3 Seagate 2T 7200 RPM SATA 3 
Optical DriveCoolingCase
DVD R/W Sony Hyper 212+ Push Pull Corsair 300R 
  hide details  
Reply
post #7 of 7
Thread Starter 
rep given, thanks alot you been a great help answering all questions.
SSF
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5-2500K @4.7GHz ASUS P8P67 (REV 3.0) MSI GeForce GTX 1060 6GB G.SKILL Ripjaws 8GB (2 x 4GB) DDR3 1600 
Hard DriveOptical DriveCoolingOS
Seagate 2TB 7200.14 ASUS DRW-24B1ST Noctua NH-U12S Windows 7 Home Premium 64-bit  
MonitorKeyboardPowerCase
BenQ GW2470 Standard black keyboard SeaSonic G Series 550W Fractal Arc Midi R2  
MouseMouse PadAudio
Logitech 310 Generic black cloth pad Creative Inspire T10 2.0 speakers 
  hide details  
Reply
SSF
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5-2500K @4.7GHz ASUS P8P67 (REV 3.0) MSI GeForce GTX 1060 6GB G.SKILL Ripjaws 8GB (2 x 4GB) DDR3 1600 
Hard DriveOptical DriveCoolingOS
Seagate 2TB 7200.14 ASUS DRW-24B1ST Noctua NH-U12S Windows 7 Home Premium 64-bit  
MonitorKeyboardPowerCase
BenQ GW2470 Standard black keyboard SeaSonic G Series 550W Fractal Arc Midi R2  
MouseMouse PadAudio
Logitech 310 Generic black cloth pad Creative Inspire T10 2.0 speakers 
  hide details  
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