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Thread: Fan plug question 4pin pwm




  1. #1
    dJabba's Avatar
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    Default Fan plug question 4pin pwm

    Hey

    Never had much to do with aftermarket fans, but now I need them. Got a question towards the "4 Pin PWM" connecter. Is this the same 4pin that is used on motherboards (f.ex. my Asus F1A75-I Deluxe) ?

    Decided on the Enermax T.B.Silent 80mm for my backplanes (3pin version) and 120mm for radi and case (not sure if i should get 3pin or 4pin PWM).
    My advice - never visit a short-url, no matter who gives it to you. You can't trust any source at any time when you don't know your target
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  2. #2
    profJim's Avatar
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    Default Re: Fan plug question 4pin pwm

    All of the 4-pin pwm fan connectors that I've seen are identical and should work with 4-pin motherboard fan headers.
    I've used 4-pin fan connectors with 3-pin motherboard fan headers as there is only one correct way to plug them in.
    Look closely at the 4-pin connector and you will see a raised rib that will only let you connect to the header the correct way.
    It's possible to use excessive force to plug in the fan connector the wrong way and cause damage if you are not careful.
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  3. #3
    dJabba's Avatar
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    Default Re: Fan plug question 4pin pwm

    thank you very much Jim, got confused by the "PWM" on 4pin, but not on 3pin .... to many standards and shortcuts in this profession :p
    My advice - never visit a short-url, no matter who gives it to you. You can't trust any source at any time when you don't know your target
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    Snuggles: Zotac Zbox HD-ID40 (Atom d525, worst purchase ever on cpu), Patriot Pyro 60GB (Thanks to Tweaktown Giveaway), 4GB 800' DDR2 SO-DIMM
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  4. #4
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    Default Re: Fan plug question 4pin pwm

    You're welcome.
    My preference is to use manual fan controllers for all of my fans to control cooling and noise depending on the demands on my system.
    Some motherboards will control the cpu fan header's speed when you use a 3-pin (non-PWM) fan.
    It's very easy to confused by the facts ;)
    Last edited by profJim; 01-13-2012 at 11:32 PM.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
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  5. #5
    dJabba's Avatar
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    Default Re: Fan plug question 4pin pwm

    on a "normal" build I prefer to set my fan speeds manually myself. In this case its for a NAS. Not much change in heat over time and I got a good motherboard/bios in reference to controlling the cpu and case fans. The 80mm for the backplanes, I'm so lucky that the backplane has a 3step fan controller (low, high, auto).

    Up until now I just bought highend cases where enough fans where installed, so never had to buy new :p

    can't wait to get started building my case (keep an eye on the modders forum later this month) :)
    My advice - never visit a short-url, no matter who gives it to you. You can't trust any source at any time when you don't know your target
    Whitey: ROG Crosshair V Formula/Thunderbolt, AMD 1090T @ 3.2GHz w. NZXT Havic 140, Corsair XMS3 1333 8GB kit, HIS IceQ X HD 6870, Corsair Force GT 120GB, OCZ Vertex4 256GB, Kingston SSDNow 16GB, Samsung 500GB 3" in casedock when needed, Chieftec Nitro88+ 650W, NZXT H2 White, 3x Asus VS248 24"
    Snuggles: Zotac Zbox HD-ID40 (Atom d525, worst purchase ever on cpu), Patriot Pyro 60GB (Thanks to Tweaktown Giveaway), 4GB 800' DDR2 SO-DIMM
    Bcube (NAS): ASUS F1A75-I Deluxe, AMD A6-3500 @ 2.1GHz, LSI 9240-8i (M1015) controller, GSkill Ares 1866 8GB blue kit, 4x Seagate SV35.5 2TB, 1x Seagate Barracuda 1.5TB, 1x Samsung HD103UJ, 1x Samsung F4 2TB, Temp. Rebel9 Alu case, Corsair H60, 2x Icy Dock MB973SP-B, NZXT UI01, Enermax T.B. Silence on docks and cpu, Aurum 500W gold PSU. (Draws 65W average, doesn't peak above 100W at any time)

  6. #6
    dJabba's Avatar
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    Default Re: Fan plug question 4pin pwm

    as it turned out, the market actually already made this decision for me, as the 4pin are sold out everywhere with 3-5weeks delivery time, I chose to go with the 3pin :)
    My advice - never visit a short-url, no matter who gives it to you. You can't trust any source at any time when you don't know your target
    Whitey: ROG Crosshair V Formula/Thunderbolt, AMD 1090T @ 3.2GHz w. NZXT Havic 140, Corsair XMS3 1333 8GB kit, HIS IceQ X HD 6870, Corsair Force GT 120GB, OCZ Vertex4 256GB, Kingston SSDNow 16GB, Samsung 500GB 3" in casedock when needed, Chieftec Nitro88+ 650W, NZXT H2 White, 3x Asus VS248 24"
    Snuggles: Zotac Zbox HD-ID40 (Atom d525, worst purchase ever on cpu), Patriot Pyro 60GB (Thanks to Tweaktown Giveaway), 4GB 800' DDR2 SO-DIMM
    Bcube (NAS): ASUS F1A75-I Deluxe, AMD A6-3500 @ 2.1GHz, LSI 9240-8i (M1015) controller, GSkill Ares 1866 8GB blue kit, 4x Seagate SV35.5 2TB, 1x Seagate Barracuda 1.5TB, 1x Samsung HD103UJ, 1x Samsung F4 2TB, Temp. Rebel9 Alu case, Corsair H60, 2x Icy Dock MB973SP-B, NZXT UI01, Enermax T.B. Silence on docks and cpu, Aurum 500W gold PSU. (Draws 65W average, doesn't peak above 100W at any time)

  7. #7
    kick's Avatar
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    Default Re: Fan plug question 4pin pwm

    The 4 pin does give you more flexibility on newer mbrds because you can set not only the speed from the bios but also the temperature at which your lower fan speed will be over ridden.

    eg: the fan speed scale is 1-10. You set a max speed of 6 in the bios. That equates to 1400 rpm(depending on fan)Thats a barely hear it speed for most 120mm fans.
    Set say 60C as the override temp of your cpu and the fan wont go over 1400 rpm until the temp reaches that level.Even then its a gradual process. The fan speed will increase gradually as the cpu temp rises and probably wont go back below 1400 until cpu temp drops to like 55C.

    One thing ,if you like connecting 12v led's to your pc,I dont mean ones that are on fans and have a circuit load already,
    Like if you wanted to make up a set of green and red leds using pwm circuits to indicate a temp rise, the leds wont last long because of the "wave pulsing"( I know cos ive tried it :( )
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