Power Supply Unit Question

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I am planning to build a gaming PC. I thought I had everything sorted out for my build, but now I have concerns regarding the PSU. These are the parts that I have listed from PCPartPicker.com:

CPU Intel Core i5-4670K 3.4GHz Quad-Core $219.98
CPU Cooler Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing $29.99
Motherboard Asus Maximus VI Hero ATX LGA1150 $189.99
Memory Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 $94.99
Storage Samsung 840 Pro Series 256GB 2.5" SSD $209.99
Seagate Barracuda 2TB 3.5" 7200RPM $84.99
Seagate Barracuda 2TB 3.5" 7200RPM $84.99
Video Card Asus GeForce GTX 770 2GB $329.99
Sound Card Creative Labs Sound Blaster X-Fi Titanium HD $149.99
Wireless Network Adapter TP-Link TL-WDN4800 802.11a/b/g/n PCI-Express x1 $39.99
Case Corsair 600T Silver ATX Mid Tower $151.98
Case Fan Aerocool Silent Master 200B 76.0 CFM 200mm $19.98
Aerocool Silent Master 200B 76.0 CFM 200mm $19.98
Aerocool Shark 82.6 CFM 120mm $12.28
Power Supply Antec 620W ATX12V / EPS12V $64.99
Optical Drive Asus BW-12B1ST/BLK/G/AS Blu-Ray/DVD/CD Writer $58.99

According to PCPartpicker, the entire build will use an estimated max wattage of 463 Watts. The GPU alone will use between 57 and 230 Watts. However, the product specs on ASUS' website says the GPU will use up to 300 watts and the Newegg review video for the card stated that ASUS recommends a minimum 600 watt PSU. I don't plan to overclock or do a dual GPU setup. I will be gaming at 1080p on either high or max settings. Will the PSU I have selected be capable of handling my needs, or should I go for one with a higher wattage? Thanks.