For dual GPU's, especially going dual High End GPU's, going LGA 2011 has it's advantages.
4770k has only 16 PCI Express lanes and hence on dual GPU setup it is going to use 8x only for a single GPU wheras in LGA 2011, the CPU has 40 PCI Express lanes and hence every GPU would run at it's max of 16x speed which makes some difference, especially in high end GPU's like the 780 Ti or AMD R9-290x
Getting a 9590 makes no sense because of it's extreme power consumption and heat output. The power draw is also way too much. Better go for the 4820k instead.
Also there is no use of 4930k for gaming, since no game uses more than 8 threads. Only a few games can make use of 8 threads. Hence the 12 thread 4930k is just waste of money, at least for gaming.
As for R9-290X Crossfire v/s 780 Ti SLI. I would choose the 780 Ti SLI because AMD Crossfire still have many issues to be dealt with especially the Multi Monitor and anything above 1080p would cause problems with Crossfire. Hence Crossfire in it's current state is not recommended. You would not get the performance that you are hoping for.
Hence I would recommend the 780 Ti SLI since SLI is way more stable in it's current state than the AMD Crossfire.
Hence this is what I recommend :
PCPartPicker part list /
Price breakdown by merchant /
Benchmarks
CPU: Intel Core i7-4820K 3.7GHz Quad-Core Processor ($313.98 @ Amazon)
CPU Cooler: Phanteks PH-TC14PE_BK 78.1 CFM CPU Cooler ($76.99 @ Newegg)
Motherboard: ASRock X79 Extreme6 ATX LGA2011 Motherboard ($224.98 @ SuperBiiz)
Memory: G.Skill Ripjaws Z Series 16GB (4 x 4GB) DDR3-1600 Memory ($139.98 @ NCIX US)
Storage: Kingston HyperX 3K 240GB 2.5" Solid State Disk ($139.95 @ Adorama)
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive ($84.48 @ OutletPC)
Video Card: PNY GeForce GTX 780 Ti 3GB Video Card (2-Way SLI) ($679.99 @ B&H)
Video Card: PNY GeForce GTX 780 Ti 3GB Video Card (2-Way SLI) ($679.99 @ B&H)
Case: Corsair 750D ATX Full Tower Case ($149.98 @ Newegg)
Power Supply: XFX ProSeries 850W 80+ Gold Certified Fully-Modular ATX Power Supply ($114.99 @ NCIX US)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($19.98 @ OutletPC)
Total: $2625.29
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-12-22 23:31 EST-0500)
Take a look at the build above and tell me what you think about it. Your feedback would be appreciated.