Closed 4-pin fans Tags: Fan Intel Components Product Last response: December 28, 2011 11:22 PM in Components Share Karsten75 December 22, 2011 3:52:04 PM I see my Intel DZ68BC mobo has 4-pin fan connectors. I can't, however find any fans on the market that has 4 pins. What does the 4th pin do and does anyone know who makes 4-pin fans? I think it controls the fan speeds and if possible I'd like to have the mobo control the fans just to see how that works out. Thanks More about : pin fans amk-aka-Phantom December 22, 2011 4:05:06 PM It's rather silly; only CPU HSFs are 4-pin. You can still connect 3-pin fans to 4-pin headers and get speed control. ahnilated December 22, 2011 4:09:05 PM One wire is ground, one wire is power, one is fan tach, one is fan speed adjustment. You can get fan speed adjustment with 3 or 4 pin fans. I have noticed with some 4 pin fans they can make a horrible squealing noise if not running at 100%. Related resources Help connecting 2x 3pin fans to 4pin mobo header - Forum Will 4-pin case fans auto adjust speed? (970 Extreme3) - Forum Case Fans - 4pin , 3pin, molex - Forum Controlling 4pin fans w/ fan controller - Forum Can I Install 4x 140mm Fans On 1x 4-Pin Adapter ????? - Forum Can't find your answer ? Ask ! Get the answer Best solution davcon December 22, 2011 4:09:27 PM Generally 4pin connectors on mobo are for the cpu cooler = allows speed adjustment. Any additional 4pin fan headers are a bonus. 4pin fans are referred to as PWM fans. sosofm December 22, 2011 4:09:51 PM http://www.newegg.com/Product/Product.aspx?Item=N82E168... http://www.newegg.com/Product/Product.aspx?Item=N82E168... The 4 pin is good for cpu coolers who have PWM. The second fan is with PWM. Karsten75 December 28, 2011 11:19:47 PM Best answer selected by karsten75. Can't find your answer ? Ask ! Publish Related resources : ForumOnly one 4-pin fan connector on mobo and two 3-pin case fans ? ForumDual 4pin CPU fans to single motherboard 4 pin connector Forum4-pin cpu fan connector Forum3-pin fan vs. 4-pin fan Forum4pin case fan to 3pin controller ForumHELP! smoke came out of my 4-pin fan header ForumHyper 212 Plus Push/Pull, But Fan is 4-Pin ? Forum3-pin and 4-pin fan connectors Forum8-pin cpu power on the motherboard, CPU fan only 4-pin Forum3-pin CPU Fan and only 4-pin CPU Fan connecter.. HELP! Forum500w PSU ForumPsu and case fans for my first build? Forum[Solved] HAF 912 - Adding Non-Stock Fans ForumQuestion about case fans Forum[Solved] HAF 912 - Stock Fans Sufficient? More resources Read discussions in other Components categories Power supplies Sound cards NICs Akasa Antec Cooler Master Cougar DeepCool Enermax !