I've purchased a Silentx iXtreme Pro 40x40x10mm (IXP-11-14) fan as a replacement for my now noisy original fan.
I know the LS1 fan wire colours relate to :-
Silentx wiring is as follows according to wiki: http://buffalo.nas-central.org/wiki/Fan
I've wired it up such that the fan was spinning - but I find that I'm still getting 4 flashing red lights followed by shutdown, so figured I would come on here for some advise. Has anyone done this that can advise what I might have done wrong?