I d recommend the 3 pin.
Molex 3 pin fan connector part number.
A bit of information on the molex fan housings.
Pricing and availability on millions of electronic components from digi key electronics.
Electop 3 pin atx fan to 4 pin molex connector cable fan power adapter cable 2 pack 4 5 out of 5 stars 159.
Multiple part product compliance statements eu rohs reach svhc low halogen multiple part industry compliance documents ipc 1752a class c ipc 1752a class d molex product compliance declaration iec 62474 chemsherpa xml.
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0022112032 connector header through hole 3 position 0 100 2 54mm from molex.
If your motherboard tries to drop the fan to say 6v instead of 12v the molex will keep pumping 12v across the same leads.
Part number 03062033 3d viewer and cad download larger image 1 57mm diameter standard 062 pin and socket plug housing 3 circuits with pre bent mounting ears natural.
Hand crimp tool for 3 50 wire to wire connector crimp pin series.
Molex accepts no liability for connector performance or tooling support where tooling other than molex tooling is used or where molex tooling is modified.
Your board will then have 6v pushing the wrong way through the fan.
Fan housing for pins 22 01 3037 fan pins female 22 30 awg wire 08 50 0113 amp tyco part numbers.
Modtek 4 pin molex to 4 x 3 pin fan connector cable power 4 fans from 1 molex connection modtek 4 pin molex to 4 x 3 pin fan connector cabl 4 5 out of 5 stars 254 8 49 8.
Plugging in both has a high likelihood of damaging your board.
2 pack molex to 3 x 3 pin or 4 pin computer pc case fan power splitter adapter cable 10 inch.
4 pin molex to 3 pin fan power cable adapter connector 12v 2 5v 2 computer cooling fan cables for cpu pc case fan model.