120mm Fan Testing on an MCR120 Radiator Round 6

[Martinm210]

It could be because the smaller center hub = smaller motor needs more power to get to the same rpm?
Hmm, i'm a little confused right now. Might just get it over with and order 2 GT15 instead.
But, then i noticed this. The batch you have are B4AP and B5AP, the only place here in sweden who has them in stock has the B3AP.
Should i go for them or wait for the B5 batch instead? Hmmm...

Interesting, I'm not sure if the B number is "Batch" or not I had my B5 AP-15 for over a year now, and the B4 is brand new It kind of makes sense though, but not ever having a B3...I couldn't say. All I know is there doesn't seem to be any noise differences that I could tell between the B4AP14 and B5AP15 other than my 15 has been a bit wonky at times.

I did stumble upon this weird looking AP-13 the other day, the center part of the hub is not open like the ones I have..?
http://cgi.ebay.com/SCYTHE-D1225C12B...#ht_2181wt_877