Quad 1080 ti Build | Need Hardware Advice

[Knoxville]

Hi All-

I'm looking to purchase a new GPU cracker with the following hardware below.  Would love to get some feedback on the build.  I have already procured the 4x1080ti FE graphics cards, so no need to comment how they are very low stock at this point.

• Motherboard: ASUS X99-E WS/USB 3.1 LGA 2011-v3 Intel X99 SATA 6Gb/s USB 3.1 USB 3.0 CEB Intel Motherboard
  
• GPU: 4x EVGA GeForce GTX 1080 Ti FE DirectX 12 11G-P4-6390-KR
  
• CPU: Intel Core i7-6800K Broadwell-E 6-Core 3.4 GHz LGA 2011-v3 140W BX80671I76800K Desktop Processor
  
• Memory: G.SKILL TridentZ Series 64GB (4 x 16GB) 288-Pin DDR4 SDRAM DDR4 3200 (PC4 25600) Intel X99 Platform Desktop Memory Model F4-3200C16Q-64GTZKO
  
• CPU Cooler: New Cooler Master GeminII S524 Ver 2 RR-G5V2-20PK-R1 120mm CPU Fan For Intel
  
• Case: Phanteks Enthoo Pro Series PH-ES614P_BK Black Steel / Plastic ATX Full Tower Computer Case
  
• PSU: Rosewill 1600W Modular Gaming Power Supply, Continuous @ 50 Degree C, 80 PLUS GOLD Certified, SLI & CrossFire Ready – HERCULES-1600S
  
• HDD: SAMSUNG 850 EVO 2.5″ 500GB SATA III 3-D Vertical Internal Solid State Drive (SSD) MZ-75E500B/AM
  

I'm open to all advice, but my primary question is if the LGA 2066 socket motherboards and CPU is something I should be considering at this point?  I'm not sure if the LGA 2066 motherboards offer the PCI-e x16/x16/x16/x16 speed throughput that the ASUS X99 offers and is known for.