I need to know what wattage power supply to use

[cluelessnafum]

This is my first computer build! Please help! I need to know what wattage power supply to buy, people have told me wildly conflicting things from 850 watts all the way to 1700 watts.


Here is rough list of the major parts not counting fans:

Processor: AMD FX 8120 8-Core Processor

Motherboard: GIGABYTE GA-970A-UD3 AM3+ AMD 970 SATA 6Gb/s USB 3.0 ATX AMD

Graphics Card: EVGA GeForce GT 520 2048 MB DDR3 PCI Express 2.0 DVI/HDMI/VGA Graphics Card, 02G-P3-1529-KR

Hard Drives: Three 75 GB hard drives and one 750 GB hard drive (and I want to be able to add another hard drive with a 2-4 TB in the future)

Other Drives: LG Electronics 24X SATA Super Multi DVD+/-RW Internal Drive Bulk with Lightscribe (GH24LS70) & one floppy drive & one zip drive

RAM: 8GB DDR3 PC3-10600 10666 1333MHz DIMM 240-Pin RAM Desktop Memory 9-9-9-25 Single Stick

Also I would like to know how much I would need to upgrade my power supply if I wanted to add the other 3 possible 8GB ram sticks to the mother board.

[cluelessnafum]

CORRECTION: TWO (not three) 75 GB hard drives and one 750 GB hard drive

[IAntDemo]

850+ but 1,000 would be better

[~Darkseeker~]

Firstly, try this

http://extreme.outervision.com/psucalculatorlite.jsp

Secondly, brand matters more than wattage. Get a between 700W and 1kW unit from a reputable supplier. Look for Modular if possible.

Manufacturers considered to be good for PSUs:

• Coolermaster
• Corsair
• Thermaltake
• OCZ
• Antec
• XFX
• Silverstone