Well without thinking much I ordered a NOCTUA FAN (none water cooled fan that fit a 2011-v3) for the CPU... Bad mistake..... the Noctua Fan is to big and covers the first slot of the X99 mother boards x16 PCI buss card slot.  After researching this some, if you use more than a 4 core CPU your just about stuck with water cooling.  Since I opted for a Thermaltake V51 case it is not a big deal, case is made for water cooling.    
 
The 28 buss CPU only uses the first slot for the x16 Video buss.  <--- Make sure you understand this.! 
 
So new builders be aware your going to be using water cooled stuff most likely.     Like most of you I was over cooling just to make sure things worked well. 

I've got a 5820K that I had under both a Phanteks PH-TC14PE and a Noctua NH-D14. Both are great, but both cover up the first PCIE slot of my X99 Classified board - which I knew about because I did a google search and found out prior to purchase.
 
I recently decided to upgrade to a NVME SSD in a m.2 to PCIE adapter card, and knew that with my 28 lane CPU that would be an issue with my PCIE slot speeds and arrangement, and my GPU was already running at X8.
 
So I got a Corsair H115i and slapped in a pair of Noiseblocker NB-eLoop B14-3's to replace the REALLY REALLY REALLY LOUD (at the Performance setting) stock fans. It's a tiny bit louder than my D14 or Phanteks at 100% (the eLoops aren't PWM), but also cools my 5820K a few degrees C better AND I've got all 28 CPU lanes fully utilized with X16 for graphics, X8 for discrete RAID card, and X4 for my m.2 to PCIE adapted NVME SSD.
 
Oh, and the only reason why I ever considered going back to an AIO water cooler is the fact that Corsair has a 5 year warranty now. I had issues with their pumps dying years and years ago, after just 2 years if I remember correctly.

If anyone is interested in AIO then look no further than Enermax's LiqMax2. It's so darn quiet it's unbelievable. It's also much cheaper than LiqMax1, but still built like a tank. Corsair H***i series vs LiqMax1/2, I pick Enermax every time. I have Corsair too and pump is ridiculously loud. Internet is filled with horror stories of leaking Corsairs, most often seals between fitting and tube. Last time I was talking about this less than week ago with guy where H100i fried his 970. IMHO LM2 is best deal on the market when we talk 120/240mm AIOs. The most important fact - LM family is not some lousy Asestek re-brand.

I beg to disagree. Enermax is more or less re-brand yes, but of Lepa. It's designed and manufactured by Apaltek. 
 
As for retarded patent troll which Asetek really became, I hope that everybody copies them. Then they can try to sue whole world. LOL 
 
OEM info is available for example here (Enermax does not reveal OEM, but determined users will find-out anyway he, he)
 
http://www.gamersnexus.ne...es-liquid-coolers-oems

I wish they sued EK over Predator line. I would probably die laughing if they pursued this AIO-suing nonsense any further. :D
 
Technically Cooler Master products or Swiftech (or EK) are not AIO. These are not permanently sealed, you can expand, change stuff. I'll never understand corporations. There is no logic, only money.
 
Rule of Acquisition #10: Greed is Eternal.

PalmtreesFL
Well without thinking much I ordered a NOCTUA FAN (none water cooled fan that fit a 2011-v3) for the CPU... Bad mistake..... the Noctua Fan is to big and covers the first slot of the X99 mother boards x16 PCI buss card slot.  After researching this some, if you use more than a 4 core CPU your just about stuck with water cooling.  Since I opted for a Thermaltake V51 case it is not a big deal, case is made for water cooling.    
 

I was in a similar clearance issue with a different cpu cooler.
The Noctua NH D15S should take care of your PCIe slot #1 clearance issues.  Its asymmetrical design works very well.  Check your chassis clearance.  160mm height is required.
No water cooling needed for me.

I have an x99 ftw board and I was able to fit an evo 212 with push/pull fans. I had just enough room to fit gpu into 1st pci slot (wasnt touching heatsink) and have corsair vengeance ram underneath. It did make it alot harder to make adjustments if i needed to remove ram, gpu etc, but it fit just fine nevertheless. It did a pretty good job keeping my 5930k cool too, never went over 55C with OC of 4.2 ghz.