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post #11 of 18
Thread Starter 
http://www.performance-pcs.com/catal...ducts_id=25036

whats the difference between a PWM and non PWM ?
post #12 of 18
Quote:
Originally Posted by phaseshift View Post
http://www.performance-pcs.com/catal...ducts_id=25036

whats the difference between a PWM and non PWM ?
I'm pretty sure PWM stands for pulse width modulation, basicly it decreases the fan rpm (rotation per minute) by sending pulses of current to the fan very rapidly, so the fan instead of receiving a continuos flow current receives only a fraction of the current it needs to rotate at the nominal speed.

When adjusting rpm for non PWM fans you need a voltage controller to decrese the voltage and as a result the fans spins lower then nominal speed at nominal current. 12V is normal voltage and with the help of a fan controller (which uses a potentiometer) the voltage can be decresed, some fan controllers can bring it all the way down to 0V.

I'm an amator so take what i say with a grain of salt.
Edited by Pentdragon - 4/6/11 at 12:46am
post #13 of 18
Thread Starter 
Quote:
Originally Posted by Pentdragon View Post
I'm pretty sure PWM stands for pulse width modulation, basicly it decreases the fan rpm (rotation per minute) by seding pulses of current to the fan very rapidly, so the fan instead of receiving a continuos flow current receives only a fraction of the current it needs to rotate at the nominal speed.

When adjusting rpm for non PWM fans you need a voltage controller to decrese the voltage and as a result the fans spins lower then nominal speed at nominal current. 12V is normal voltage and with the help of a fan controller (which uses a potentiometer) the voltage can be decresed, some can bring it all the way down to 0V.

so if I wanted to use a non PWM fan I would need a fan controller? If not it will just spin at 12v which is max rpm?
post #14 of 18
Quote:
Originally Posted by phaseshift View Post
so if I wanted to use a non PWM fan I would need a fan controller? If not it will just spin at 12v which is max rpm?

If the fan is PWM it can be controlled either in the BIOS of the mobo or with the help of proprietary or 3rd party software like Speedfan.

Also i'd recommend the following fans:
- Scythe Gentle Typhoon AP-14 or AP-15 + silicon screws for mounting (i believe they don't come included, ask the retailer)
- NoiseBlocker BlackSilentPro PL-2
Edited by Pentdragon - 4/6/11 at 12:46am
post #15 of 18
Nexus real silent (a Yate Loon D12SL really) is very quiet you wont hear it unless its next your ear (you will hear a slight hum) but you don't have a PC that close anyway.

GT-15 is also quiet and can be made quieter by using a fan controller or a cable mod.
post #16 of 18
What do people think of the Noctua NF-P12-1300? All that it's cracked up to be? Or the NF-S12B?
Edited by ocpokey - 4/6/11 at 10:12am
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(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600k @ 5.0Ghz 24/7 ASUS P8P67PRO AMD 5870x2 8GB GSkill Ripjaw X 1600 @ CL8 
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ADATA S599 64GB SSD + 2x 1TB Spinpoint (Raid 0) Windows 7 64Bit Dell 23" Razer Lycosa 
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Seasonic X650 HAF X 
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Bleeding Edge
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600k @ 5.0Ghz 24/7 ASUS P8P67PRO AMD 5870x2 8GB GSkill Ripjaw X 1600 @ CL8 
Hard DriveOSMonitorKeyboard
ADATA S599 64GB SSD + 2x 1TB Spinpoint (Raid 0) Windows 7 64Bit Dell 23" Razer Lycosa 
PowerCase
Seasonic X650 HAF X 
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post #17 of 18
Quote:
Originally Posted by ocpokey View Post
What do people think of the Noctua NF-P12-1300? All that it's cracked up to be? Or the NF-S12B?
NF-P12 its like using a vibrator for case cooling, it is not a quiet a noctua make out and really expensive but that's marketing for you.

well my one was crap anyway and that's my opinion on them.
post #18 of 18
Noiseblocker is awesome...this is an old review but it has good pictures. Love those blue blades...

http://www.xbitlabs.com/articles/coo..._15.html#sect0
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