Ah, didn't even think about an adapter. Thanks for that.
I'm using 120mm fans, would 4 of them be too much for the single PWM socket?
it would be close, imo i wouldnt go over 1 amp for combined fans connected to the motherboard - some motherboards can do much more but most can handle around 1amp
something like this would be goodhttp://www.ebay.com.au/itm/Gelid-1-to-4 ... 20d944daae
if they are low rpm fans they they should use less than .25 amps i would think and if so i would use a splitter
if you are worried about running all four on the motherboard you could always just run 3 of them and have a manually adjustable controller like this for the fourth in a pci slothttp://www.ebay.com.au/itm/Computer-PCI ... 460a6fd6d1
edit: a noctua fan i was just looking at http://www.noctua.at/main.php?show=prod ... g=en&set=1
uses .05A which you could easily connect 4 to a motherboard but the fans i use on my radiator (scythe ultra kaze's) use .6A in which case i wouldnt risk even putting two of them on a motherboard
they are examples from extreme ends of the scale (i doubt you would have anything as crazy as ultra kaze's and noctua's are very power efficient and low rpm)
if you have a look at your fans they should have a sticker on them mentioning their power draw (in amps)