Final Build Critique on a New Gaming PC please

[AnarchistRise]

Heya, First time builder looking for some insight on my new Build. If all goes smooth will be ordering tomorrow.



Rosewill BLACKHAWK Gaming ATX Mid Tower Computer Case

ASUS Z97-PRO(Wi-Fi ac) LGA 1150 Intel Z97 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard

Intel Core i7-4790K Haswell Quad-Core 4.0GHz LGA 1150 Desktop Processor

SAMSUNG 840 EVO 2.5" 250GB

WD BLACK SERIES 1TB 7200 RPM 3.5" Internal Hard Drive

ASUS DRW-24B1ST/BLK/B/AS Black SATA 24X DVD Burner - Bulk - OEM

Cooler Master Hyper 212 EVO - CPU Cooler with 120 mm PWM Fan

EVGA SuperNOVA 850 G2 80 PLUS GOLD Certified Full Modular Power Supply Intel 4th Gen CPU

Arctic Silver 5 High-Density Polysynthetic Silver Thermal Compound

G.SKILL Sniper 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory3 1600 (PC3 12800)

Things to Note, Is that PSU enough to run a second GTX970 in the future?
And regarding OS, Is windows 8 better than Windows 7? Or is that strictly personal choice.

Thank you very much for the time.

 

[ImDaBaron]

Is this just for gaming? If so then I would go with a I5 4690K. Yeah the power supply should be fine for that. I would go with Windows 8 but it's basically a personal choice. Great build otherwise.