Yea but the problem is I only have one fan, so I don't know how I would do that.
the fan for block erupters is to keep them cool but it isnt a necessity,the block erupter will just get very hot but will be fine u til you can get a 2nd fan. you could also get away with using a male usb to female usb extension cable aslong as its plugged into the motherboard dirctly