CoolerMaster fan A/C adapter

Ok...I'm thinking about buying this model: Y720DCD-25T1-GP...but I need to get something clear...What do they mean by 3/4-pin? Does this mean it has 3-pin, but I can ask for 4-pin? or do they mean the default is 3-pin, and in the package there is a 4-pin adapter?...I need some answers on that...

Also, can you recommend an A/C adapter which would fit the wires on the Y720DCD-25T1-GP, so that I can power the Y720DCD-25T1-GP from the wall? For example (let's say that the Y720DCD-25T1-GP comes with 4-pin) would this A/C adapter work: http://cablesonline.stores.yahoo.net/mo4inpotoacp.html

Finally, if I want to power two Y720DCD-25T1-GP, do I need TWO 12 volt A/C power adapters, one for each fan basically, or do can I just take ONE A/C power adapter to power both fans through a Y-Splitter (and if I can, can you recommend me a Y-Splitter or would this one work (let's say the Y720DCD-25T1-GP comes with 3-pin): http://www.performance-pcs.com/catalog/index.php?main_page=product_info&products_id=941). Note that I want to be able to power both fans at maximum rpm.


Thank You

 

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