Hey, that's some pretty good performance and noise. Not bad. Optimumtech said quality was a tad below the A12x25, but it basically performs like a A12x25. The single fan pricing is kinda stupid right now, but they are selling regular (non-Turbo) 2-pack for $55CAD. They even have a turquoise version on Amazon.
Glad to have the competition though. It's about time someone came around and knocked Noctua down a peg on their stupid A12x25 pricing that's perennially more expensive than even their industrial NF-A14s. Coming from an owner of P12 redux ($18), F12 ($30), A14 ($28), A14 Chromax ($33), A14 2000rpm industrial ($36), and A12x25 ($37). It's a nice fan, but honestly the hype is getting tiring, and so is the pricing.
But I dunno, for future case fans I'll probably still take the new Phanteks T30 though. Still undeniably the king, just hard to use on air coolers.
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Noctua also changed the final hub design on the Chromax. It looks like a weird nipple now instead of the classic GT look like the regular and prototype. Final insult is the $44cad price tag. For $44 it better be a IP67-rated A14 industrial, which it clearly is not.