Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Can this spliter be used on fans with 3-pins?
Document: I used these to help me control multiple PCM fans, albeit not exactly as described as i wanted to have RPMs for each plug. Basically i used the split off end's PCM line and hooked it in at a different 3 pin connector on my MB and spliced in this connectors PCM line.All said and done, this worked perfectly before i disected it, the split end only had 3 connectors as it should (12v, ground, empty, PCM) and is exactly what i needed.
Unlike the last PWM Y Splitter I purchased, this one didn't need any work from me. One side is truly PMW [4-pins] and the other is simply a connector [3-pins]. My mobo controls both 4-pin PMW fans w/o any problems or confusion...now my my HDDs are cooler.I have 2 of these controlling 4 fans, and I've had no problems on my X79 mobo.
This was supposed to be a 4-pin PWM Y splitter, but one of the sides had only 3 wires/3 pins installed. So only 1 of the split cables was able to use the motherboard 4-pin connection to control the fan speed.
It works. I used it for my Hyper 212 EVO heat sink for a dual fan setup. Its a 4 pin connector all around. A small side note is that one of the fan pins is missing; Starting from left to right, it is the 3rd one. 1 Female connector and 2 male connectors.
This is a well sheilded sleeved PWM cable. Used it in my HTPC for powering my Gentle Typhoon 120mm fans.
Very solid construction, good packaging, the sleeves fully cover the wires. Plugs fit nice too. Used it to put a 2nd fan on my CM TX3 and it controls both fans.PWM-Y Cable Adapter
Exactly what I needed. My motherboard only had 3 PWM ports. This only has one leg reporting RPM but still is better than having a few 'dead' fans.
Other splitters I've bought had the sense signal coming from both fans spliced into one cable, which will lead to erroneous readidngs in the motherboard utilities if used. This one, besides being an excellent cable with plastic mesh armor, not only has the sense signal only in one of the split plugs, but has it labeled! Good product. Good price.
You can't go wrong with these fan header splitters. tough wires, long enough for full towers but bendy enough to cram in my frag box. I ended up not needing (or being able to fit) a push/pull setup so i just used them as case fan splitters, But when it was hooked up it definitely worked well with throttling fans.
Excellent Cable, does what it is supposed to do - Makes the motherboard take control of the RPM's of 2 fans. Used it to allow my motherboard to control the Fan speed of my Dual CoolerMaster Blademaster 120mm in push/pull configuration on my Hyper 212 plus. Works like wonders, plus the quality of the cable is great, sleeved and very resistant.
Answer: Yes. I have it connected to two 3 pin fans.