06.15.17 Update and added photos:
Made some small changes to the build, almost not worth stating but I'm bored so why not. I changed out the two NF-F12 fans that where on the front as intake fans to two NF-P12 fans. The NF-F12 did move more air into the case but the P12 fans are so much more pleasant to hear. IMO, you can't beat the NF-F12 fans if you're pulling through a filter, grill, rad, or heatsink. But just as Noctua states, they are not recommended as case fans. At certain RPMs they produce a hum that is just right at causing vibrations. No other Noctua fan that I have tested does this. So I made the switch only to lower the noise (NF-F12 is also one of Noctua's loudest fans).
I also contacted Noctua and they sent me a free set of fan clips to mount a 3rd fan to my D14. Why you ask? Because Noctua that's why! So I strapped on another P12. This gave me a surprising 4°C drop max core temp. It also covered what little of my motherboard you could see haha.
I am pretty pleased with my overclock. I run it at 4.4GHz w/ 1.230v for 24/7 use. At this clock, temps are very good and performance is great.
End of update.
I made a few upgrades to my main build that I feel were worth posting (previous post: https://pcpartpicker.com/b/nsqkcf ). I upgraded both my 980 Tis to 1080s, the Air 240 case to a Silverstone KL06 which allowed for a taller cooler leading to the upgrade from an NH-U9S to an NH-D14, and added a 2TB HDD for back ups.
GTX 1080: This was my first upgrade done a few months ago. I was very happy with the performance of my 980 Tis and did not plan to upgrade. Then my brother and I made a trip to the local Best Buy where they had SEVEN of these puppies in stock. My brother (knowing that I am addicted to upgrading my rig) persuaded me into purchasing two of them with the excuse of: "Just return them if you don't like them." Well of course I wouldn't not like them lol. I will say the bump in performance was nice, but the main reason I was so pleased with the change was the noise output and use of only two 8 pin cables to run both of them. As you can see, I prefer air cooling. Just for those that do not know: when running SLI, unless liquid cooled, it is best to stick with reference cooled cards because they exhaust outside of the case rather than inside like the blower style coolers that are so popular. So this way, the top card that is already not getting the air flow that the bottom card is, is at least not having to cool with the bottom cards exhaust too. This is especially true for a situation like mine where I have no empty slot between the cards. The reference cooled 980 Tis were the loudest component in my build of course. The reference 1080s are still probably the loudest component, but only under load and it seems as if the noise was cut in half. I was very surprised at how much quieter and cooler the 1080s run compared to the 980 Tis.
KL06: I spent a great deal of time searching cases. As I was very pleased with the aesthetics and air flow of the Air 240, I did not like how much space the fat chassis took up on my desk and the low clearance for components that made my GPU cables push against the window and restricted me to a low profile CPU cooler. Finding a new case was very difficult because I am so particular. Of course I wanted it to be slimmer, be able to accommodate larger components, be mATX, have a high airflow style front grill, and have direct airflow to the CPU and GPUs. Finally, I found the KL06. It met all my requirements except one... It did not have direct airflow. But no problem, I just removed the drive cage and installed a bracket in one of the 5.25" bays that can hold four 2.5" drives. Not to mention the case has an inverted layout so I can view the window at my desk as I like my PC of the left side of my monitor. Now, a few gripes about the case: If your PSU is 180mm long, you have to fight to fit anything in the 5.25" bays, the top panel is a huge pain to put back on, and my biggest complaint... the small window. Why in the world would Silverstone think it is a good idea to mount a SDD in a displaying orientation but then have such a small window that it cannot be seen!? This makes no sense to me. But either way I still love the case. One last thing: As the front is a high airflow, mesh type design, it does not flow quite as well as the Air 240. I typically use NF-S12A fans as my intake because they are so quiet. However, they do not produce hardly any static pressure. Once the front grill is in place, their airflow seemed to be cut in half! So I switched to NF-F12 on the front which moved air much better and lowered my max CPU temp 5°C and my top 1080 8°C! I used one of the S12A fans to exhaust which it seems much better at.
The inverted board layout: I was very skeptical of changing to this layout. The Geforce GTX logos will be upside down for crying out loud!! But in the end, I very much to like it.. For one main reason: the top 1080 is no longer physically on top. So it may be still restricted of air, but at least there is no heat rising from the bottom card to hinder is cooling even more. This made the temps of the two much more identical going form around an 8°C difference to about a 2-3°C difference, with the top card (physically the bottom now) still running a little hotter.
NH-D14: Not much to say here... Obviously it is bigger and better than the NH-U9S as expected. But I will say, for being so small, the NH-U9S is a little monster. I only saw about a 6°C drop in my max temp from the switch. So anyone in need of a smaller air cooler, get the U9S. I definitely prefer the D14 for the slightly better performance, but also just because I love the way a huge air cooler looks.
5930K overclock: I've never tried really maxing this thing out. I want it to be reliable so I run it at 4.1GHz pulling 1.2v. A one hour stress test yields a max core temp on core 1 of 72°C. During gaming, the max core temp is usually 54°C. Photo editing is what seems to work it the hardest producing a max core temp of 65°C. Very pleased with this CPU.
Overall I really enjoyed building in this case and doing these upgrades. The KL06 may not be as user friendly as the Air 240, especially if you cram as much in it as I did, but the end result is worth it. My goal has continually been to put an extreme amount of power into a small compact case. I feel like I have gotten even closer to achieving that with these changes given that the KL06 has a slightly smaller total volume than the Air 240 but yet allowed me to add a much bigger cooler.
I use my rig for mostly photo editing and gaming. It has been extremely reliable and suits me well. The 5930K makes editing a breeze and the 1080 SLI maxes out every game I have tried at 3440x1440.
Oh and cause I know someone will ask: The 850 Pro is my OS, the SM951 is used for importing the photos I edit, the 500GB Evo is where I export the photo once completed, the 1TB Evo is my gaming drive, and the 2TB HDD is for backing up everything.