New PC Not Powering On

hello all! i just attempted to assemble my new computer today after finally getting all the parts (i'll post my specs at the bottom). when i try to power it up, none of the case lights come on and the pc remains off. However, the fans on the GPU twitch and that is pretty much the only sign of life i'm getting out of it. Any and all help is appreciated, i spent a lot on this pc and i want it to work as soon as possible.

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor
CPU Cooler: Cooler Master Hyper 212 Plus 76.8 CFM Sleeve Bearing CPU Cooler
Motherboard: ASRock Z77 Extreme4 ATX LGA1155 Motherboard
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive
Video Card: MSI GeForce GTX 660 Ti 2GB Video Card
Case: Raidmax Viper (Red) ATX Mid Tower Case
Power Supply: Rosewill Hive 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply