How to temp control fans to reduce power consumption

[RELIABLE_ACORN]

1x120mm 4pin to 4pin cpu fan header controlled separately

1x120mm 3pin
1x140mm 3pin
3x200mm 3pin

All other fans are ran to PSU via adapters. Fan speeds fixed. Ideally I want to temp. control all fans to reduce power consumption.

http://www.newegg.com/Product/Product.aspx?Item=N82E16812311002&cm_re=fan_splitters-_-12-311-002-_-Product

I'm trying to decide on similar adapters or fan controller. In case the link stops working, its a 4pin pwm splitter but the 2 power wires (dc so its just + and - wires?) are ran to a molex connector, allowing you to power the splitter off a molex connector.

*I played around with Speedfan program and made a fan curve based on gpu temp. I'm thinking of running with one of these adapters connected to an unused 4pin header. I don't think I need to take pwm into any consideration if I use speedfan program. Being a 4pin header v. 3pin header shouldn't make any difference for this, so go with whatever mobo fan header works for the adapter of choice. I'm only concerned with having 1x120 1x140 and a 3x200 fans drawing current from a single molex connector with this adapter. Assuming the amp draw is ok, then this adapter and speedfan program would solve my goal by temp. controlling fan speeds?

 

[kanewolf]

The power used by fans is miniscule. To reduce noise I can understand but to reduce power usage, not worth it.