Conclusion: I once heard a very intriguing quote that went something like, "A wise old owl sat on an oak. The more he saw, the less he spoke. The less he spoke, the more he heard. Why aren't we like the wise old bird?
Excerpt: Noctua has wowed us before with its coolers: Both the NH-U12P and NH-D14 impressed us with top-tier performance. The NH-C14, which features a perpendicular cooling-fin stack and two fans, is larger than the former but smaller than the 2 pounds, 12 ounces of the latter.
Pros: Great cooling with low vertical clearance; low-noise adapters.