As some users know, i'm a big fan of the Lacie SSD solution. For completeness and fairness of information, i want to add a piece of info i stumbled upon which is puzzling me. I have two drives, both are the same Lacie 1tB SSD model and both are awaiting the iMac to be used as main storage device. So what, you might say...here we go: one is perfectly silent, the other one has the internal vent always on. Always. It doesn't matter whether there's activity or not, the vent is always on. The opposite goes for the other one: the vent is always off. I've tried all possible combinations, and clearly one of the two is not performing the way it's supposed to. I obviously prefer the 100% silent one, but if that means that being silent means it will cook, obviously this is one point in favor of the internal option. The noise is not particularly loud, but it's definitely there. Benchmarks and performance are exactly the same. Lacie support is telling me the fan is supposed to be intelligent and not to be always on, which would make sense, but then again i've not yet managed to get the silent one to ever turn the fan on, which is making me doubt a lot and worry for its reliability (i copied files on it for one hour...it certainly went hot but fan never kicked in. Performance remained the same). Will report on the evolution of this, and if anyone has similar experience its welcome to share its knowledge.