Although this discussion has been quiet for nearly a year, I'm adding a post to reflect my recent (partial) experience with the Haswell NUC which I believe is common. The bottom line is that, having been a member of SPCR since it's beginning, I am sure that Mike's review was accurate, but it may be misleading in the setting in which many would use a NUC. As setup by the factory, the current Intel NUC is noisy!
I have three NUCs--one the older i3 Intel model, one the newer i3 in the Tesla case Mike reviewed (thank you; I love it!), and an i3 in the Intel case that holds a 2.5" SSD. I just purchased the latter to replace my HTPC, and when I installed RAM and booted it, it had a very loud fan noise--way louder than my older i3 and too loud even for an HTPC placed on the other side of the room. Going into the BIOS, I found out that the fan was running at about 3,000 rpm and unlike the one Mike reviewed the minimum duty cycle was set at 40% (vs. Mike's at 18%). Doing a little web-searching, I found this was how Intel is now setting the BIOS. Here's an example from Intel's forum:https://communities.intel.com/thread/47 ... 0&tstart=0
(It's on page 3 and has the Intel moderator's (Scott) explanation of why they set it at 40%.)
Clearly Intel has changed its approach between the time of Mike's review and now. Here's my speculation about what going on. The issue is not with the CPU overheating; it's with the wireless adapter mounted beneath the mSATA SSD overheating. If you dig around on the web, you'll find that there are complaints about the wireless adapter misbehaving as a result of overheating. The way that Intel has chosen to prevent that is better ventilation through higher fan speeds. (Is that what Scott is alluding to when he refers to "other components"?) This would account for why Mike had no problem, because it appears that there was no wireless adapter in his setup, and he didn't test stressing it.
I've now set the minimum duty cycle at 25%, based on Scott's advice and the fan is pretty quiet at a little above 2,000 rpm. But I'm waiting to get my wireless adapter to install Windows, and then I'll see if I have any problems. If it requires 40% to cool it, I'll surely send it back (or fork over the money for another Tesla). I'll provide follow-up once I have some experience with it.
As a final possible relevant fact, I've had no problem with the wireless in the Tesla case (although not a lot of experience yet). However, I'm using 2 x 2.5" SSDs so the only thing that's occupying the full mSATA slot is an mSATA to SATA adapter which I suspect puts off less heat than an mSATA SSD would (just guessing at that). Or it may be that, as Mike found, the Tesla is just better at cooling than the Intel case.
Have others had any recent experience with the Intel NUC?