See
http://www.tomshardware.com/forum/261222-31-build-advice
Try -
CPU: Intel Core i7-5960X 3.0GHz 8-Core Processor ($999.99 @ SuperBiiz)
CPU Cooler: Corsair H100i 77.0 CFM Liquid CPU Cooler ($99.99 @ B&H)
Motherboard: ASRock X99 Extreme11 ATX LGA2011-3 Motherboard ($579.99 @ SuperBiiz)
Memory: G.Skill Value 32GB (4 x 8GB) DDR4-2400 Memory ($259.99 @ Newegg)
Storage: Samsung 850 EVO-Series 500GB 2.5" Solid State Drive ($177.89 @ OutletPC)
Storage: Seagate Barracuda 3TB 3.5" 7200RPM Internal Hard Drive ($89.95 @ SuperBiiz)
Video Card: EVGA GeForce GTX 980 Ti 6GB Superclocked ACX 2.0+ Video Card (4-Way SLI) ($679.98 @ Newegg)
Video Card: EVGA GeForce GTX 980 Ti 6GB Superclocked ACX 2.0+ Video Card (4-Way SLI) ($679.98 @ Newegg)
Video Card: EVGA GeForce GTX 980 Ti 6GB Superclocked ACX 2.0+ Video Card (4-Way SLI) ($679.98 @ Newegg)
Video Card: EVGA GeForce GTX 980 Ti 6GB Superclocked ACX 2.0+ Video Card (4-Way SLI) ($679.98 @ Newegg)
Case: Corsair 900D ATX Full Tower Case ($329.99 @ Newegg)
Power Supply: EVGA SuperNOVA G2 1600W 80+ Gold Certified Fully-Modular ATX Power Supply ($298.23 @ Newegg)
Optical Drive: Asus BW-16D1HT Blu-Ray/DVD/CD Writer ($73.78 @ OutletPC)
Operating System: Microsoft Windows 8.1 Pro OEM (64-bit) ($131.69 @ OutletPC)
Wireless Network Adapter: Asus PCE-N53 802.11a/b/g/n PCI-Express x1 Wi-Fi Adapter ($10.31 @ Newegg)
Total: $5771.72