Antec NEO ECO 520C 520W - Enough?

Is this PSU enough for the build below? PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

MoBo: MSI 870A-G54 AM3 AMD 870 SATA 6Gb/s USB 3.0 ATX AMD Motherboard
HDD: SAMSUNG Spinpoint F4 HD322GJ/U 320GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
Vid: XFX HD-587X-ZNFC Radeon HD 5870 1GB 256-bit DDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card
CPU: AMD Phenom II X4 965 Black Edition Deneb 3.4GHz Socket AM3 125W Quad-Core Processor HDZ965FBGMBOX
RAM: G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL7D-4GBRM

1 CDRW drive and 1 CD Rom. Maybe 3 fans, 2 80mm and 1 120mm.
Planning to OC but nothing crazy, probably just to 3.8GHz.
I don't know what SLI is and I don't have any desire to CF.

The PSU is a combo deal through newegg with the Ram for $20 off, as well as already $20 off it's own price, so it's a great deal, but only if it's enough to run the system.

Thanks in advance