If you can't use Smart Fan and are planning on 24/7 OC activies, just use as it is. At 12V they are still quiet fans.
Well, we must have different definitions of quiet. There is no way I'm sitting next to a NH-D14 all day with both fans at full speed, or any other cooler with 1350rpm fans for that matter. 300rpm, that's what I call quiet, and I can actually still hear that when it's quiet in the evening/at night.
Of course you do, if your temps stay fine, there is no need to enjoy the higher acoustics.
Look, I enjoy luxury and never penny pinch on a cooler, but there is just no way the NH-D14 (or the Phantek, or the Silver Arrow etc) is a good deal for any cpu running stock. There are plenty of alternatives that cool way more than necessary with very low noise at half the cost.
It's not brand dependent. My MSI Z77A-G43 can easily control both, while I agree some boards have these limitations (I had one Z77 (premium) model Gigabyte that refused to control voltage). In my experience, not a single MSI H/Z77/B75 board I have purchased had this limitation (I must have been very fortunate). Certainly, if you're the unlucky owner of a board that lacks such a basic feature, then you have to use a PWM fan instead or a separate fan controller.
Actually it is brand dependent, although I may be wrong about MSI. The thing is, almost no review ever mentions vital stuff like this, it's always: "oh yeah, there's a bunch of fanheaders too" but nothing about if they can be controlled, and if so, what kind of control, pwm, dc or both. So I have to search high and low, hope the manual contains any sort of information or base my knowledge on other peoples experiences, as described in this thread for example:
http://forums.anandtech.com/showthread.php?t=2292328 in which the op clearly states his 3-pin fans are running full speed when connected to the cpu fan header on his MSI board. Maybe he missed some setting and I would be grateful if you could elaborate. What I can tell you is that my Asus board can only control pwm fans and it's been that way since their P35 boards (while my Asus 965 board did control both 3-pin and pwm fans).
And guess what? They didn't, until recently. The 2011 edition is simply their newest product. You can order PWM fans separately, though.
Yes, that's what I said? But as could be expected, the s2011 edition only fits on s2011 boards. 2 Noctua pwm fans will cost at least $40 extra.
Personally, I still dislike the current implementation of a PWM fan, even if it revs up for a split of a second, it is still an annoyance in otherwise a totally silent system. Imagine, if your iPhone was making a sporadic noise during normal operation? Same thing.
Annoying rev ups can be fixed by adjusting the fanprofile, while still giving you the option of going full out when needed. Using resistors disables any control whatsoever. We can argue all day but it's a simple fact you're giving up control. It's ok if you don't care about that but please don't present it as a perfect solution.