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2 fans on CPU header (push/pull)

post #1 of 7
Thread Starter 
here's the situation:

Just got a hyper212 plus and 5 YL's. I want push/pull on my hyper212, and thus I want (right?) to have identical fans for push/pull. So, I'm going to remove my stock CM fan, and replace it with push/pull (ie 2x) YL fans.

My question is in regards to plugging into the system fan header on the motherboard. Now obviously there isn't 3 pin passthrough to 3 pin, and since they only have 3 pin, there is no fan control - so my question is can I plug 2 fans onto my single CPU fan header on the motherboard safely? This would be accomplished by fan2 molex to molex fan1 to 3 pin motherboard.

I just want to make sure it's safe. I'm aware I can't control speed, and I'm fine with just seeing if I can monitor RPM rather than asking about it obnoxiously
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post #2 of 7
Here's what I use. It works well, and it does send PWM signal from the front fan, so fan speed reporting is accurate.
 
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post #3 of 7
Yes.

Also it's "with regard to" not "in regards to"
/hwaw
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/hwaw
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post #4 of 7
Thread Starter 
^Thanks. I'll go ahead and link up 2 of the YLs molex to molex passthrough, then attach to the cpu header. Why would it be bad? i hear people say hooking up too many fans to a single motherboard header is bad sometimes. So 2 is okay but, what, 10 isn't or something? Does voltage get split between them, ie my 2 yl's will run at 6v x 2 instead of having a single 12 v running fan?
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post #5 of 7
Thread Starter 
actually about that voltage split - i think ill run one to motherboard, and one to molex, that way both run at full speed. i dont want 2 x fans running slower on it.
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post #6 of 7
They'll be able to run at full speed with a splitter. I've got two Blademasters hooked up to a single CPU header and both ramp up to full speed when my CPU needs it.
/hwaw
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/hwaw
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post #7 of 7
Thread Starter 
I appreciate everyone telling me to spend money, but what is left ambiguous is what happens if I don't buy something. Such as:

Quote:
They'll be able to run at full speed with a splitter.
So can I deduce they will run at half speed if both hooked up to same header? And fan control isn't an issue, because Yate Loons don't have control. i really doubt I'd ever buy any other fans for it anyways, the only thing I can imagine spending money on is maybe 2x140mm for the top (using my stock nzxt case fan 120mm as top exhaust), maybe a 120 or 140 mm for a top front intake where my lack of cd drives bay is. If anything, I'd maybe replace a few YL's with low speed.

See here what I have going on: 4 x YL's, 1 x NZXT, 1 CM Blademaster (stock hyper hsf). I have 2 molex left on my PSU, 2 headers on my mobo, and a strip of SATA power suppliers, where I am going to pull the last one and mod it into a molex connector I ripped off an old PC at work. That's 5 connections for 7 fans, meaning 3 need to be hooked in a row. I'd rather not reduce the speed of any of them, but if I have to, then I will probably lower my intake and 2 exhaust, and leave my side intake (will probably move it, making too much sound from grill on side) and CPU push/pull fans at full power.

Will probably have to buy a fan controller, but that's not any time soon ;/
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Phenom ii X4 955C2, $31, 5 broken pins, works! ... Biostar A770e3 6.3 Red&Black MSI GTX 460 768mb Twin Frozr II 2 x 2GB Kingston HyperX 1333 OC to 1348CL7@1.65v 
Hard DriveCoolingCoolingCooling
Intel X25-M G2 80GB SSD NH-D14 SE2011 6 x Case Fans (4 x YL-M, NZXT case fan, CM Hype... Jerryrigged Chipset-Northbridge 80mm HSF 
CoolingOSMonitorKeyboard
Jerryrigged VRM Heatsink (sawed off stock AM2 h... Hax'd W7 Ultimate 64bit Sanyo DP19640 19"1360x768 Ducky Cherry Browns 10keyless 
PowerCaseMouseMouse Pad
Antec Earthwatts 430D NZXT Gamma Steelseries Kinzu Optical Steelseries Blizzcon Diablo 3 
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Build In Progress
(17 items)
 
   
CPUMotherboardGraphicsRAM
Haswell i7-4770K 4.8GHz@1.452v/1.97vRIN Gigabyte Z87X-UD3H Older Gigabyte 7950 (H60 Mod) 2x4GB Gskill 2400CL11 Hynix CFRs 
Hard DriveCoolingOSMonitor
Samsung 830 128gb Corsair H110 w/4x 140mm Yate Loon High Blues W7 x64 Ultimate Yarrgh Matey Dell U2312HM Matte IPS 1080p 
MonitorMonitorKeyboardPower
Sanyo DP19640 18.5" 768p KDS Rad-7xp 1024p CM Storm Quickfire Rapids Brown Rosewill Capstone 750 
CaseMouseMouse PadAudio
Bitfenix Shinobi Modded CM Storm Spawn Steelseries Diablo 3 2 set CD Speaker + Big Sub 
Other
Bitfenix Recon Fan Controller Moded 
CPUMotherboardGraphicsRAM
Delidded i7-3770K 5GHz@1.499 Gigabyte Z77X-UD5H 1.1 Sapphire Dual-X 7950 3L Boost 4x2GB Mushkin Ridgeback 2200mhz 8/11/8/27 1.75v... 
Hard DriveCoolingCoolingCooling
Intel X25-M 80GB SSD NH-D14 SE2011 Noctua 120/140/140 Fans 3 x Yate Loon Mediums (Petras) 2 x NZXT Havik 140mm Fans 
OSMonitorMonitorKeyboard
Hax'd W7 Ultimate 64-bit Sanyo DP19640 19'' KDS Radius Rad-7xp 17'' Ducky 1087 MX Brown 10keyless 
PowerCaseMouseMouse Pad
Rosewill Capstone 550w Modular NZXT Source 210 w/Modded Window Razer Deathadder 3.5G Steelseries Blizzcon D3 
AudioAudioOtherOther
Phillips FW-C250 2 Speaker Set w/3 CD Changer JBL Sub 6 Subwoofer NZXT Sleeved LED Strip 1m Blue NZXT Sentry 2 Fan Controller 
Other
Colonial Blue Paracord Sleeving 
CPUMotherboardGraphicsRAM
Phenom ii X4 955C2, $31, 5 broken pins, works! ... Biostar A770e3 6.3 Red&Black MSI GTX 460 768mb Twin Frozr II 2 x 2GB Kingston HyperX 1333 OC to 1348CL7@1.65v 
Hard DriveCoolingCoolingCooling
Intel X25-M G2 80GB SSD NH-D14 SE2011 6 x Case Fans (4 x YL-M, NZXT case fan, CM Hype... Jerryrigged Chipset-Northbridge 80mm HSF 
CoolingOSMonitorKeyboard
Jerryrigged VRM Heatsink (sawed off stock AM2 h... Hax'd W7 Ultimate 64bit Sanyo DP19640 19"1360x768 Ducky Cherry Browns 10keyless 
PowerCaseMouseMouse Pad
Antec Earthwatts 430D NZXT Gamma Steelseries Kinzu Optical Steelseries Blizzcon Diablo 3 
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Reply
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