I'm building a new gaming pc and need some advice/help. I would like opinions on this build. I'm not sure about the power supply wattage, what would work best?
CPU Processor: Intel Core i5-3570K 3.4GHz (3.8GHz Turbo) (Intel HD Graphics 4000) BX80637I53570K
Motherboard: ASUS P8Z77-V LK
Memory: G.SKILL Ripjaws X Series 8GB F3-1600C9S-8GXM
Storage/Hard Drive: SAMSUNG 840 EVO 500GB SSD MZ-7TE500BW
Video Card: MSI GeForce GTX 670 2GB N670 PE 2GD5/OC
Case: Cooler Master HAF XM RC-922XM-KKN1
Power Supply: COOLER MASTER Silent Pro M2 620W RS620-SPM2E3-US or COOLER MASTER Silent Pro M2 720W RS720-SPM2D3-US
Optical Drive: ASUS DVD Burner DRW-24B1ST/BLK/B/AS - OEM
Operating System: Microsoft Windows 7 Home Premium 64-bit GFC-00019
Sound Card: Creative Sound Blaster Audigy SE 7.1 OEM 30SB057000000
CPU Processor: Intel Core i5-3570K 3.4GHz (3.8GHz Turbo) (Intel HD Graphics 4000) BX80637I53570K
Motherboard: ASUS P8Z77-V LK
Memory: G.SKILL Ripjaws X Series 8GB F3-1600C9S-8GXM
Storage/Hard Drive: SAMSUNG 840 EVO 500GB SSD MZ-7TE500BW
Video Card: MSI GeForce GTX 670 2GB N670 PE 2GD5/OC
Case: Cooler Master HAF XM RC-922XM-KKN1
Power Supply: COOLER MASTER Silent Pro M2 620W RS620-SPM2E3-US or COOLER MASTER Silent Pro M2 720W RS720-SPM2D3-US
Optical Drive: ASUS DVD Burner DRW-24B1ST/BLK/B/AS - OEM
Operating System: Microsoft Windows 7 Home Premium 64-bit GFC-00019
Sound Card: Creative Sound Blaster Audigy SE 7.1 OEM 30SB057000000