Are

**these**the fans to replace?

Or is it

**this**one?

Or

**all of them**?

I've purchased this one on Amazon and was wondering if it will replace the larger one just fine (the original one has 2 wires while this one has 3 but I've read somewhere that a fellow AO user purchased it so I did the same):

Are these good to replace the smaller ones? I've found a link to them here on AO but sides seem to be 0,5 cm shorter (4 vs. 4,5 of the original ones) and heigth seems to be 1 cm lower (1 vs. 2, if I've taken measures correctly in both cases).

This being said, should I order a couple of these fans? If not, can you point me to the right one?

Thanks.